53results about How to "Stable static operating point" patented technology

The invention discloses a differential amplification signal processing system for a sewage network monitoring device based on big data. The differential amplification signal processing system mainly consists of a processing chip U, a triode VT2, a polar capacitor C6, a polar capacitor C7, a differential amplification circuit, a second-order low-pass filter circuit, a frequency error correction circuit and a differential amplification circuit, wherein the frequency error correction circuit is connected with a CS pin, a G pin and an OUT pin of the processing chip U respectively; and the differential amplification circuit is connected in series between a CLK pin of the processing chip and the frequency error correction circuit. Through adoption of the differential amplification signal processing system, low-frequency interference signals in signals can be eliminated or restrained, and frequency points of signals subjected to anti-interference processing can be amplified, so that the signals are more stable. Moreover, phase and frequency errors of multicarrier signals in data signals can be corrected, so that the signal processing effect is improved, and the accuracy of sewage data information obtained by a data processing center is ensured effectively.

The invention discloses a local discharging sensor combining a graphene diaphragm with a micro optical fiber interference cavity and a detection method based thereon. The local discharging sensor comprises a tunable laser device (1), a laser device wavelength control module (2), an optical fiber circulator (3), monomode optical fiber (4), the micro optical fiber interference cavity (5), a photoelectric detector (6), a signal line (7), a filter (8) and a data collection card (9). A multilayer graphene membrane is adopted, so that detection sensitivity of the sensor is improved; on the basis ofstructure optimization design of the multilayer graphene membrane, the multilayer graphene membrane is enabled to adapt to local discharging detection frequency band requirements; a polyimide coatingis adopted to prolong service life of the multilayer graphene membrane; femtosecond laser is adopted to process the micro optical fiber interference cavity inside optical fiber, and a static-state working point is stabilized on the basis of laser device wavelength control. On the basis of optimization design of a detection device mounting mode, original working environment of electrical equipmentis unaffected during mounting of the local discharging sensor.

The invention discloses a broadband high-linearity low-noise driving amplifier of a 5G base station. The driving amplifier comprises an input matching network, a power protection network, a driving Darlington amplification network, a driving base bias network, an inter-stage matching bias network, a final-stage power amplification network, a final-stage base bias network and an output matching bias network. The broadband, high-linearity and low-noise driving amplifier structure capable of being applied to the 5G base station is realized by utilizing a multistage amplification network technology. According to the invention, a Darlington tube is used as a driving amplification network, the driving bandwidth of the amplifier is remarkably improved, the noise coefficient is reduced, and the power protection network is adopted, so that the driving amplifier has the good anti-burning characteristic, and the whole amplifier has the advantages of being high in linearity, high in gain, low in noise and the like in combination with the last-stage high-linearity power amplification network.

The invention discloses an audio power amplification system based on a ripple suppression circuit, which is characterized in that it is mainly composed of a preamplifier circuit, a triode VT2, a current limiter, and the positive pole is connected with the preamplifier circuit, and the negative pole is connected with the current limiter. Capacitor C3 connected to the input terminal, resistor R5 connected to the collector of the triode VT2 at one end and grounded at the other end, a ripple suppression circuit connected to the emitter of the transistor VT2, a power amplifier circuit connected to the ripple suppression circuit, and positive pole It is composed of a capacitor C4 connected to the preamplifier circuit, and the negative electrode is connected to the power amplifier circuit. The invention can filter the ripple voltage, thereby reducing the electromagnetic noise of the system and improving the stability of the system.

The invention discloses a computer data control system. The system comprises a signal input circuit, a differential regulation circuit and a voltage-stabilized output circuit, the signal input circuitreceives a signal of a signal transmission channel input end, for receiving signals, of a control terminal in the computer data control system, the differential regulation circuit receives a signal receiving signal input circuit output signal, and an operational amplifier AR3, an operational amplifier AR4 and a slide rheostat RW1 are applied to form the differential circuit to perform differential treatment on the signal; meanwhile, a triode Q1 and a triode Q2 are designed for performing positive feedback regulation on signal potential, the effect of adjusting a differential regulation circuit output signal is achieved, finally, the voltage-stabilized output circuit receives the signal output by the differential regulation circuit, the signal of the signal transmission channel input end,for receiving the signals, of the control terminal in the computer data control system is automatically calibrated effectively, the stability of the signal and the signal transmission efficiency are improved, and meanwhile the anti-jamming capability of the signal is improved.

The invention discloses a 5.8 GHz single transistor microwave motion sensor. The 5.8 GHz single transistor microwave motion sensor includes a circuit board and a microwave movement sensor circuit disposed on the circuit board, wherein the microwave sensor circuit includes an oscillating mixing unit and a signal transceiver unit, the oscillating mixing unit and the signal transceiver unit are respectively disposed on a circuit layer and an antenna layer of the multi-layer circuit board, the oscillating mixing unit is a triode, the signal transceiver unit is a microstrip transceiver antenna, thetriode is disposed on the circuit layer, and the microstrip transceiver antenna is disposed on the antenna layer. The 5.8 GHz single transistor microwave motion sensor is advantaged in that one transistor is utilized to complete signal transmission, reception and frequency conversion, functions of a traditional 5.8 GHz microwave motion sensor needing more than two transistors are achieved, the single microstrip antenna is utilized to form signal transmission and reception, the circuit is made to be more simplified, cost is lower, and the 5.8 GHz single transistor microwave motion sensor is easy to promote and apply.

The invention discloses a linearized bias circuit and a radio frequency power amplifier, and belongs to the technical field of radio frequency power amplifiers. The radio frequency power amplifier comprises a linearized bias circuit and a radio frequency amplifier unit circuit. The linearized bias circuit is electrically connected with the radio frequency amplifier unit circuit; by improving the circuit structure and introducing the structure of the current mirror, temperature compensation is carried out for the problem of heating under high power, the temperature drift of a static working point is inhibited, and the problem of poor high-power output linearity of the power amplifier is solved while the area of the bias circuit is not excessively increased.

The invention discloses a signal high-fidelity wireless audio receiving system. The system is characterized by mainly consisting of a processing chip, a capacitor C12, a capacitor C13 and the like, wherein the anode of the capacitor C12, after passing through a resistor R12, is connected with the -IN pin of the processing chip U, the cathode of the capacitor C12 is connected with the GND pin of the processing chip U, the capacitor C12 is grounded at the same time, the anode of the capacitor C13 is connected with the OUT pin of the processing chip U, and the cathode of the capacitor C13 is taken as an output end. According to the invention, interference signals doped in audio signals in a wireless transmission process can be filtered at a receiving end and an output end, the interference signals are filtered by use of a dual-filtering mode, the filtering effect is enabled to be more thorough, the output audio signals are cleaner, the play quality of sound is improved, and the hearing effect of people is enabled to be better.

The invention discloses an air-purifying ventilation fan control system with the constant-current voltage stabilizing and wave filtering functions. The air-purifying ventilation fan control system mainly comprises a transformer T, a diode rectifier U1, a triode constant-current circuit voltage stabilizing chip U2, s smoke sensor YW, a triode VT1, a triode VT2, a triode VT3, a triode VT4, a triodeVT5, a relay K, a polar capacitor C10, a polar capacitor C12, a resistor R7, a resistor R8, an adjustable resistor R9, a resistor R10, a resistor R11, a resistor R12 and the like, wherein the relay Kis connected in series between the P pole and the N pole of a diode D3. The air-purifying ventilation fan control system disclosed by the invention has the advantages that through the smoke sensor YW,the air pollution condition within the use scope of an air-purifying ventilation fan can be detected, and the detected information can be processed; the control voltage can be adjusted; and furthermore, the air pollution condition can be controlled through the information detected by the smoke sensor YW, and then the air-purifying ventilation fan can be controlled to automatically open and close.

The invention discloses a high-performance signal processing system for a cruising device based on a multiple self-sensing technology. The high-performance signal processing system mainly comprises a processing chip U, an infrared camera WS, a field effect transistor MOS1, a triode VT3, a polar capacitor C8, a synchronizing signal regulation circuit, a differential amplification circuit, an image signal preprocessing circuit, an output signal amplification circuit which is respectively connected with a PIUT pin of the processing chip U and an emitting electrode of the triode VT3, and the like. According to the high-performance signal processing system disclosed by the invention, a low-frequency interference signal in image signals can be eliminated or suppressed, and phases and frequencies of image data signals also can be amplified, so that an image signal processing effect of the high-performance signal processing system disclosed by the invention is improved, and accuracy of the image data signals received by a satellite positioning system is effectively ensured.

The present invention discloses a multi-circuit processing monitoring system for turbine temperature signals based on network technologies, which is mainly composed of a master station system and a substation system connected to the master station system through a wireless network; the main station consists of a first single chip microcomputer, a data store, a display, a data processor and a signal processing unit, and a first wireless transmission module; the substation system consists of a second single chip microcomputer, a second wireless transmission module, an air cooler, RS-485 bus and a temperature cruiser A, B and C connected to the second single-chip microcomputer.The signal collected by the substation system of the invention is sent to the master station through the wireless network, which does not need to be connected through the line so that the whole monitoring system is simpler, the monitoring information transmission is quicker and the cost is lower.

The invention discloses a highly-stable signal processing system for a sewage discharging network monitoring device based on big data. The highly-stable signal processing system is mainly formed by a processing chip U, a triode VT2, a polar capacitor C6, a polar capacitor C7, a signal bandwidth regulation circuit, a differential amplification circuit, a second-order lowpass filtering circuit, and a frequency error correcting circuit connected with a CS tube pin, a G tube pin and an OUT tube pin of the processing chip U. The differential amplification circuit is serially connected between a CLK tube pipe of the processing chip U and the frequency error correcting circuit. Low-frequency interference signals of the processing chip can be eliminated or prohibited; frequency point of the signal after anti-interference process can be amplified, so the signal can be more stable; phase positions of multi-carrier wave signals of data signals, and frequency errors can be corrected, so signal processing effect can be improved; and accuracy of sewage data information acquired from a data processing center can be effectively guaranteed.

A computer signal compensation circuit includes signal input circuitry, Operational Amplifier Calibration Circuit and Regulated Filter Circuit, the signal input circuit receives an analog signal froman input terminal of a signal transmission channel for signal received by a computer control terminal, the operational amplifier calibration circuit receives the output signal of the signal input circuit in two ways, within a noninverting input of an input op amp AR1, the other input transistor Q2, in a switching circuit composed of a transistor Q3 and a transistor Q9, at the same time, an operational amplify AR3 is designed to input the signal into a voltage stabilize filter circuit after comparing and processing the signals, at last, that voltage stabilize filter circuit adopts a voltage stabilizing circuit composed of a transistor Q6 and a voltage stabilizing tube D3, At the same time, a Pi-filter circuit composed of inductor L3, capacitor C6 and capacitor C7 is designed, which can automatically calibrate the analog signal in the signal transmission channel of computer control terminal, and improve the stability and efficiency of signal transmission.

The invention discloses a power grid energy-saving constant current drive control system based on emitter coupled amplification. The system is composed of an EMI single-phase filter, a silicon controlled rectifier, a boosting type power factor correcting circuit, a single-phase high-frequency frequency converter, a sampling protection circuit connected with the single-phase high-frequency frequency converter, a single-chip microcomputer, a band-pass filtering low-distortion oscillating circuit and a boosting type constant current driving circuit. The system is characterized in that an emitter coupled amplification circuit is also connected between the sampling protection circuit and the single-chip microcomputer in series; the boosting type constant current driving circuit is adopted, has the functions of under-voltage locking protection, over-voltage protection and over-temperature protection, has extremely high driving stability, and can effectively improve the accuracy of the control system; meanwhile, the emitter coupled amplification circuit is adopted and has a stable quiescent operating point, stable output current and high input resistance, and the energy-saving effect of the system is effectively improved.

The invention discloses a frequency point adjustment type signal processing system based on self-sensing technology. The system is mainly composed of a processing chip U, an infrared camera WS, a field-effect tube MOS1, a triode VT3, a polar capacitor C8, a differential amplifier circuit, an image signal preprocessing circuit, and an output signal amplifying circuit connected with a PIUT pin of the processing chip U and an emitter of the triode VT3 separately. The system disclosed by the invention can eliminate or inhibit low frequency interference signals in image signals, and the system disclosed by the invention can also amplify the phases and frequency of the image data signals in the image data signals, thereby improving the image signal processing effect of the system disclosed by the invention and effectively ensuring the accuracy of the image data signals received by a satellite positioning system.

The invention discloses a high-linearity radio frequency power amplifier. The power amplifier comprises an input matching circuit, a pre-stage amplifying circuit, a first linearization biasing circuit, a first inter-stage matching circuit, an intermediate-stage amplifying circuit, a second linearization biasing circuit, a second inter-stage matching circuit, a power-stage amplifying circuit, a third linearization biasing circuit, an output matching circuit and the pre-stage amplifying circuit, wherein the intermediate-stage amplification circuit and the power-stage amplification circuit respectively adopt A-class amplification structures, source degeneration inductors are respectively arranged in the intermediate-stage amplification circuit and the power-stage amplification circuit, and the pre-stage amplification circuit, the intermediate-stage amplification circuit and the power-stage amplification circuit respectively utilize the internal source degeneration inductors to carry out feedback so as to expand a linear working area; the first linearization bias circuit, the second linearization bias circuit and the third linearization bias circuit are active bias circuits designed based on a PMOS tube and an NMOS tube respectively; the advantages of the invention are that the gain is high while the linearity is higher.

The invention provides steam ablation equipment. The steam ablation equipment comprises a handle, a heating part, a power module, an injection part and a first processing circuit, wherein a containing cavity and a nozzle connected to the containing cavity are formed in the handle, the heating part is arranged in the containing cavity, the power module is electrically connected to the heating part to supply power to the heating part and enable the heating part to emit heat, and the injection part is connected to the containing cavity to inject water into the containing cavity. The first processing circuit comprises a first control module, a voltage comparison module, a temperature comparison module and a protection logic processing module, wherein the voltage comparison module and the temperature comparison module are both electrically connected to the first side of the protection logic processing module, and the first side of the protection logic processing module is electrically connected with the first control module.

The invention discloses an audio power amplification system, which is characterized in that it mainly consists of a preamplifier circuit, a triode VT2, a current limiter, the positive pole is connected with the preamplifier circuit, and the negative pole is connected with the input end of the current limiter. Capacitor C3, one end is connected to the collector of the triode VT2, the other end is grounded resistor R5, a power amplifier circuit connected to the emitter of the triode VT2, the positive pole is connected to the preamplifier circuit, and the negative pole is connected to the power amplifier circuit Capacitor C4, and inductance L1 connected in series between the preamplifier circuit and the emitter of the triode VT2. The present invention can amplify the audio signal, and the present invention has a stable static operating point, so as to ensure that the waveform of the amplified audio signal is the same as that of the pre-amplified audio signal, and avoid the distortion of the audio signal after the amplification, resulting in signal Distortion, thereby ensuring the quality of sound playback.

The present invention discloses a low -inconsistent power amplifier system based on the opening and turbulence of the noise circuit. It is characterized by a static bias circuit, which is connected to the static bias circuit.Connecting noise inhibitory circuit, connecting negative electrode and noise inhibitory circuit, the positive electrode as the capacitor C1 of the input terminal of the amplifier system, one end connects to the negative electrode of the capacitance C1, and the other end of the ground resistance R1.The present invention can automatically execute the mute when connecting the power supply, eliminating the impact of the speaker when the large current when it is power -over, thereby protecting the speaker.

The invention discloses a frequency compensation audio power amplification system based on a ripple suppression circuit, which is characterized in that it mainly consists of a preamplifier circuit, a triode VT2, a current limiter, and the positive pole is connected with the preamplifier circuit, and the negative pole is connected with the limiter. The capacitor C3 connected to the input terminal of the current transformer, the resistor R5 connected to the collector of the triode VT2 at one end and grounded at the other end, and the ripple suppression circuit and frequency compensation circuit respectively connected to the emitter of the triode VT2. The invention can filter the ripple voltage, thereby reducing the electromagnetic noise of the system and improving the stability of the system. At the same time, the invention can compensate the frequency of the audio signal to make the output audio signal more stable and improve the quality of sound playback.

An ultra-low noise analog amplifier for a three-dimensional resistivity data acquisition system, including two parts, the first part is a direct-coupled voltage series negative feedback ultra-low noise amplifier composed of six transistors, and the second part is composed of three operational amplifiers low noise amplifier. In the first part, the emitter of the second stage provides a bias current to the base of the first stage. While obtaining the bias current, a DC negative feedback is introduced to make the static operating point of the circuit more stable. Adding to the bias current feedback circuit The capacitance is added, which greatly improves the input impedance of the amplifying circuit; the second part is two non-inverting input universal integrated operational amplifiers with highly consistent performance parameters, with double-ended signal input and only single-ended signal output, common mode rejection ratio Very high, it has a very good effect on electromagnetic field interference suppression, and can make the measurement accuracy below 0.1μV, which can greatly reduce the weight of field sending equipment and receiving equipment, and greatly improve the efficiency of electrical exploration work.

The application discloses a class D power amplifier, comprising: an integral amplification module comprising a first input end, a second input end, a first output end and a second output end, the first input end and the second input end respectively receiving a first audio signal and a second audio signal, the integral amplification module performs integral amplification on the first audio signaland the second audio signal and then outputs a first driving signal and a second driving signal through a first output end and a second output end respectively, and the first output end and the firstinput end are connected with the two ends of the first pull-down resistor respectively; the second output end and the second input end are connected with the two ends of the second pull-down resistorrespectively, and the first driving signal and the second driving signal are used for driving an external load. The class D power amplifier also comprises a common-mode bias current generation module,used for providing a first bias current and a second bias current which are equal in magnitude, one end of the first bias current is connected with the first input end, and the other end of the firstbias current is grounded; one end of the second bias current is connected with the second input end, and the other end is grounded. The invention further discloses an electronic device. The power amplifier has the advantages of being good in bottom noise, power consumption and the like.

The invention discloses a metal plate touch key component. The metal plate touch key component comprises a metal plate, a mounting plate and a sensor, wherein a sensing area is arranged on the upper surface of the metal plate; the mounting plate is arranged on the lower surface of the metal plate and corresponds to the position of the sensing area; the sensor is arranged on the mounting plate; sensing electrodes with an even number are arranged on the sensor; each sensing electrode is provided with a sensing electrode lead. According to the metal plate touch key component provided by the embodiment of the invention, due to the fact that the sensing electrodes with the even number are arranged on the sensor, the number of the sensing bodies on the sensor is even and is increased, the change of sensing parameters of the sensor is more stable, and the phenomenon of a blind area can be eliminated; the sensing electrodes with the even number can sense parameter change caused by noise in the sensing area with the even number, so that the noise can be inhibited through the symmetry of parameters, a static working point is effectively stabilized, and the metal plate touch key component can be applied to a place with a more rugged environment.

The invention discloses an emitter-coupled amplification-based energy-saving control system for a smart power grid. The emitter-coupled amplification-based energy-saving control system comprises an electro-magnetic interference (EMI) single-phase filter, a silicon controlled rectifier, a step-up power factor correction circuit, a single-phase high-frequency converter, a sampling protection circuit, a single chip microcomputer and a band-pass filtering low-distortion oscillating circuit, wherein the silicon controlled rectifier is connected with the EMI single-phase filter; the step-up power factor correction circuit is connected with the silicon controlled rectifier; the single-phase high-frequency converter is connected with the step-up power factor correction circuit; the sampling protection circuit is connected with the single-phase high-frequency converter; the single chip microcomputer is connected with the sampling protection circuit; the band-pass filtering low-distortion oscillating circuit is connected between the step-up power factor correction circuit and the sampling protection circuit in series; and the emitter coupled amplification-based energy-saving control system is characterized in that an emitter-coupled amplifying circuit is also connected between the single-phase high-frequency converter and the single chip microcomputer in series. By the emitter-coupled amplifying circuit, the circuit has the effects of stabilizing a static working point, stabilizing output current and increasing the input resistance of the circuit; and the energy-saving effect of the system is effectively improved.

The invention relates to an ultralow noise analogue amplifier for a three-dimensional resistivity acquisition system, which comprises two parts. The first part is a directly coupled voltage series negative feedback ultralow noise amplifier consisting of six transistors; the second part is a low noise amplifier consisting of three operational amplifiers; in the first part, an emitting electrode on the second stage provides bias currents for base electrodes on the first stage; when the bias currents are obtained, DC (Direct Current) negative feedback is introduced, so that a static working point of a circuit is more stable; a capacitor is added into a bias feedback circuit, so that an input impedance of an amplification circuit is greatly improved; the second part is formed by two in-phase input universal integrated operational amplifiers of which the performance parameters are highly consistent, adopts double-end signal input and single-end signal output, has a very high common mode rejection ratio and a very good effect on interference suppression on an electromagnetic field and can enable the measurement accuracy to reach below 0.1muV, so that weights of field transmitting equipment and receiving equipment can be greatly reduced and working efficiency of electrical prospecting is greatly improved.

The invention discloses a low-distortion power amplifier system based on a peak clipping circuit, which is characterized in that it mainly consists of a static bias circuit, a power amplifier circuit connected with the static bias circuit, the negative pole is connected with the static bias circuit, and the positive pole is used as Capacitor C1 at the input end of the power amplifier system, one end is connected to the negative pole of capacitor C1, the other end is grounded resistor R1, the negative pole is grounded, the positive pole is connected to the power amplifier circuit after resistor R10, and the capacitor C5 is connected to the power amplifier circuit. The composition of the peak clipping circuit. The invention has a stable static working point, thereby ensuring that the waveform of the amplified signal is the same as that of the signal before amplifying, avoiding signal distortion caused by signal distortion after amplifying, and greatly improving the quality of sound playback.

The invention relates to a crystal oscillating circuit, which comprises an oscillating stage circuit, a direct current negative feedback circuit, and a push-pull amplifier circuit. The oscillating stage circuit generates an oscillator signal and outputs the oscillator signal to the direct current negative feedback circuit; the direct current negative feedback circuit performs amplitude control on the oscillator signal of the oscillating stage circuit and feeds back the oscillator signal to the oscillating stage circuit; the oscillating stage circuit outputs the oscillator signal which is subjected to the amplitude control to the push-pull amplifier circuit by the direct current negative feedback circuit; and the push-pull amplifier circuit is a post-stage amplifying circuit, amplifies the oscillator signal which is input and subjected to the amplitude control and outputs the oscillator signal to the outside. According to the invention, a transistor V5 adopts an emitter follower, so that an output load of the crystal oscillating circuit is less, and oscillation starting of the crystal is facilitated; and the capacitance of a capacitor which is connected in series with the crystal is increased, so that the capacitive reactance of the capacitor in the circuit is reduced, an alternating current which runs through the crystal is increased, and the driving power of the crystal is increased.

The invention discloses a low-distortion power amplifier system based on a noise suppression circuit. The system mainly comprises a static biasing circuit, a power amplifier circuit connected with the static biasing circuit, the noise suppression circuit connected with the static biasing circuit, a capacitor C1 of which cathode is connected with the noise suppression circuit and anode is taken as the input end of the power amplifier system, a resistor R1 of which one end is connected with the cathode of the capacitor C1 and other end is grounded, and so on. The system has a stable static working point. The waveforms of signals after amplification and the signals before amplification are ensured to be the same. Signal distortion resulting from distortion of the signals after amplification is avoided. The sound playing quality is greatly improved.

The invention discloses a low-distortion power amplifier system based on a current negative feedback circuit. The capacitor C1 as the input end of the power amplifier system is composed of a resistor R1 whose one end is connected to the negative electrode of the capacitor C1 and the other end is grounded. The present invention has a stable static operating point, thereby ensuring that the waveform of the amplified signal is the same as that of the signal before amplification, avoiding signal distortion caused by signal distortion after amplification, and greatly improving the quality of sound playback.

The invention discloses a waterproof and stable triode and a preparation method thereof, comprising a tube body, a base pin, an emitter pin, a collector pin, a rubber inner shell, a protective inner shell, a rubber shell, a protective shell, and a locking screw. Hole, locking screw, rubber backing plate, protective cover, heat dissipation grid, heat conduction groove, heat conduction silicone column, heat conduction silica gel plate, positioning groove, positioning column, connection groove, connection block, connection screw hole, connection screw, fixing ring , annular sealing groove, rubber sealing ring and limit ring; the invention optimizes the packaging structure, enhances the waterproof performance of the triode, prevents water seepage during use, protects the insulating layer of the triode, improves the safety of the triode, and optimizes the The heat dissipation structure enhances the heat dissipation performance of the triode, thereby completely conducting the excess heat inside the triode to the outside, avoiding the problem of high temperature overheating of the triode during use, and the static operating point is more stable, ensuring the conductivity of the triode.