181results about How to "The output signal is stable" patented technology

A switching converter, and a control circuit and a control method thereof are disclosed. A feedback circuit is separated from a slope compensation circuit through a buffer circuit. Therefore, an output current of the slope compensation circuit can not influence on a feedback signal and an output signal. The output signal of the switching converter can remain stable.

The invention provides a signal wiring structure in a GOA (gate driver on array) circuit of a liquid crystal display. The structure comprises a plurality of first metal layers, an insulating layer and a plurality of second metal layers, wherein each first metal layer is provided with a control signal wire; the insulating layer is formed under the first metal layers; the plurality of second metal layers are formed under the insulating layer, and the control signal wire on each first metal layer is electrically connected with the corresponding second metal layer through a plurality of through holes; and the number of the through holes formed on the control signal wire on each first metal layer is the same. According to the signal wiring structure, the control signal wire on each first metal layer is electrically connected with the second metal layer through a plurality of through holes, and the number of the through holes formed on the control signal wire on each first metal layer is the same, so that the impedance values on all control signal wires are uniform, and input and output signals of each stage of the GOA circuit are stable, and the image display quality is improved.

A magnetic field detector having a reference magnetoresistive element and a magnetic field detecting magnetoresistive element. The reference magnetoresistive element and the magnetic field detecting magnetoresistive element each has a stack structure including an antiferromagnetic layer, a fixed layer of a ferromagnetic material with the direction of magnetization fixed by the antiferromagnetic layer, a nonmagnetic layer, and a free layer of a ferromagnetic material with the direction of magnetization adapted to be changed by an external magnetic field. The reference magnetoresistive element is such that the direction of magnetization of the fixed layer and the direction of magnetization of the free layer in the nonmagnetic field are parallel or antiparallel to each other, and the magnetic field detecting magnetoresistive element is such that the direction of magnetization of the fixed layer and the direction of magnetization of the free layer in the nonmagnetic field are different from each other. Thus, it is possible to provide a magnetic field detector capable of singly calibrating the sensitivity and the resolution of the detector whenever required.

The invention provides a method for realizing a high-dynamic CMOS (complementary metal-oxide-semiconductor) image sensor. The CMOS image sensor is of a 4T structure. The method comprises the following steps: inputting a first time sequence pulse signal into a resetting transistor; when pulse signals exist, controlling the resetting transistor to open so as to reset a floated diffusion region; and inputting a second time sequence pulse signal into a well region in which the floated diffusion region is positioned, wherein the pulse time of the second time sequence pulse signal is same as that of the first time sequence pulse signal, and the second time sequence pulse signal is matched with the outside light intensity, so that a junction capacitor in the floated diffusion region is a variable capacitor which changes along with the change of the outside light intensity, therefore the purpose of adjusting the junction capacitor of the floated diffusion region along with the outside light intensity is achieved so as to realize the high-dynamic CMOS image sensor.

The invention discloses a phase inverter, a drive circuit and a display panel. The phase inverter comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a first capacitor and a second capacitor. According to the technical scheme, the second transistor is controlled through the grid electrode of the second transistor to be prevented from being switched on reversely, and the electric potential of the grid electrode of the fifth transistor is maintained through the second capacitor. When a first clock signal is changed into a low level from a high level (correspondingly, the first transistor, the second transistor, the third transistor, the fourth transistor and the fifth transistor are all NMOS transistors) or changed into a high level from a low level (correspondingly, the first transistor, the second transistor, the third transistor, the fourth transistor and the fifth transistor are all PMOS transistors), the electric potential of the grid electrode of the fifth transistor can be kept stable. In this way, the output signals of the phase inverter can be free of influences of changes of the first clock signal, the phase inverter can generate stable output signals, and then the display panel with the phase inverter can achieve a better display effect.

The invention relates to a constant voltage control method for output voltage of a primary-side feedback flyback type converter. On the basis of a main topological structure of the flyback type converter, the output voltage is accurately sampled on a primary-side auxiliary winding by a DAC sampling mechanism, a pure digital mode is completely used on the condition of no adoption of a traditional large-area A / D converter and is self adaptively inserted into a DCM, a reference voltage V<REF> is obtained by the DAC sampling mechanism and a load detection module, the reference voltage V<REF> in a digital control circuit is adjusted according to accurate feedback quantity, and the accurate control of the output voltage in a continuous conduction mode is finally achieved.

The invention discloses a steering wheel steering angle sensor device for an automobile electronic stability program. The steering wheel steering angle sensor device comprises a base (2), a first gear (1), a second gear (5), a third gear (4), a first magnet (6), a second magnet (3), a first magnetic inductive sensor (7) and a second magnetic inductive sensor (8), wherein the base is provided with three positioning grooves (21, 22 and 23); the first gear (1) is arranged in the first positioning groove (21); the second gear (5) is arranged in the second positioning groove (22); the third gear (4) is arranged in the third positioning groove (23); the first magnet (6) is fixed on the second gear (5); the second magnet (3) is fixed on the third gear (4); the first magnetic inductive sensor (7) and the second magnetic inductive sensor (8) are arranged on the base (2); the second gear (5) and the third gear (4) are in meshed connection with the first gear (1) respectively; the positions of the first magnet (6), the second gear (5) and the first magnetic inductive senor (7) are aligned; and the positions of the second magnet (3), the second magnetic inductive sensor (8) and the third gear (4) are aligned.

The embodiments of the invention provide an inverter, a driving method thereof, a GOA (Gate driver On Array) unit, a GOA circuit and a display device and belong to the technical field of display. The inverter is used for supplying stable inverter output signals. The inverter comprises a control module and an output module, wherein the control module is used for controlling the voltage of a control node under the control of first clock signals of a first clock signal terminal, second clock signals of a second clock signal terminal, input signals of an input signal terminal, voltage of a first electric level terminal and voltage of a second electric level terminal; the output module is used for leveling voltage of an output signal terminal and the voltage of the first electric level terminal or the voltage of the second electric level terminal under the control of the control node and the input signals of the input signal terminal. The embodiments of the invention are applied to the manufacturing of displays.

An analog to digital converter comprises a differential input portion that receives an input voltage and a reference voltage and has a first and second output terminals, a positive feedback portion connected to said first and second output terminals, a buffer if CMOSFETs connected at its input to the first output terminal, a second buffer connected at its input to the second output terminal, and a comparison circuit including a first switching portion connected between the first and second output terminals for connecting and disconnecting the first and second output terminals in response to a comparison clock signal. The comparison circuit is connected at its output to the first or second buffer. The input voltage and the reference voltage are compared when said switching portion changes from the connecting condition to the disconnecting condition in response to the comparison clock signal.

Disclosed is a resistance detection device used for the opening and closing process of the elevator door in the elevator detection technical field. In the invention, the left connecting device and the right connecting device of a double cantilever beam are arranged between a simultaneous tooth-shaped belt and a hanging plate; the left connecting device and the right connecting device of the double cantilever beam are respectively provided with strain force measurement devices; the strain force measurement devices measure the drive force applied on the connecting devices and send to a dynamic strain meter; the dynamic strain meter amplifies the signal and outputs the signal to a data acquisition card; a rotation encoder is mounted on the shaft of a permanent magnet synchronous motor in the elevator; the position information of the motor shaft is collected and transmitted to the data acquisition card; the computer processes the derivative operation towards the position information of the motor shaft in the data acquisition card to obtain the speed and acceleration values at any position during the opening and closing process; the resistance of the opening and closing of the elevator door is figured out according to the acceleration and drive force values. The resistance detection device in the implementation embodiment has the advantages of high sensitivity, easy calibration, being influenced by the environmental temperature and the humidity slightly and stable output signal.

The present invention provides an optical fiber perimeter warning method for realizing anti-polarization comedown and a device thereof. Concretely, a signal modulating module is used for modulating the phase of a light path signal and feeds back and controls the polarization state of the light path signal after the phase modulation; a polarization controller is arranged at one path sensing optical fiber of a Mach-Zehnder interferometer; the polarization controller is used for feeding back and controlling the input polarization state of a one path Mach-Zehnder interferometer and adjusting the output light path signal of the path, so the visibility of light path output can be stabilized by the technology of feeding back polarization control to provide the stable light path output signal for signal identification; at the same time, the feeding back and controlling process of a system is also simpler, thereby reducing the operating and maintaining cost of the system.

The invention provides a heterodyne detection device based on light injection locking and a light phase-locked loop, which comprises a polarization tracking section, a heterodyne detection section anda down-conversion section, and is characterized in that the heterodyne detection section comprises an injection locking section, a coherent detection section and a light phase-locked feedback loop; the injection locking section comprises a first polarization-maintaining optical branching device, an optical phase shifter, a polarization-maintaining circulator, a local laser and a second polarization-maintaining optical branching device; the coherent detection section comprises a polarization-maintaining 2 * 2 3dB coupler, a balance light detector pair, a low-noise trans-impedance amplifier anda first power divider; the optical phase-locked feedback loop comprises a first amplifier and a loop filter; the down-conversion section comprises an ultra-narrow band-pass filter, a second amplifier, a second power divider, a phase shifter, a pi / 2 power divider, a third amplifier, a third power divider, a first mixer, a second mixer, a first low-pass filter and a second low-pass filter. Heterodyne detection is adopted, frequency synchronization of LO light waves and main control light waves is achieved, the receiver achieves zero frequency deviation, phase noise is small, and output signalsare stable.

The invention discloses a bionic shell-type breathing monitoring friction nano-generator and a preparation method thereof, and relates to the field of energy collection technology, micro-electro-mechanical system and breathing monitoring. The friction nano-generator is arranged as a bionic shell-type structure of which one end is adhered and fixed and the other end swings with the air flow, the driving range of the breathing behavior is enabled to be larger, the sensitivity of breathing monitoring can be enhanced, and self-energizing breathing behavior monitoring can be realized by making fulluse of micro-energy of breathing airflow, Compared with the conventional breathing monitoring sensor, the external power supply system is not required, and the bionic shell-type breathing monitoringfriction nano-generator has the advantages of simple structure, stable output signal, convenient carrying, low material requirement, low processing cost, mass production, easy installation and the like and has great application prospect in the field of breathing monitoring.

The invention discloses a clutch master cylinder capable of outputting a displacement signal, which comprises a cylinder body, a piston matched with the inner wall of the cylinder body, a push rod connected with the piston, an inner ring, an outer ring matched with the push rod, and a seal ring matched with the inner wall of the cylinder body, and is characterized in that the piston is produced by magnetic material with an aluminum-nickel-cobalt magnet; a Hall element, a socket connector connecting body and a sensor housing are combined into a whole by casting, a wiring harness socket connector and the socket connector connecting body are connected by injection molding, and the signal is outputted by the wiring harness socket connector; and the sensor housing and the cylinder body are press-mounted into the whole by interference fit, and the Hall element in the sensor housing corresponds to the piston in the cylinder body. The clutch master cylinder adopts non-metal material, the weight is small, the structure is compact, and the assembly is convenient; by adopting a Hall principle sensor, the non-contact output of the displacement signal can be realized. The output of the signal of the clutch master cylinder is stable, the response speed is fast, and the clutch master cylinder is durable and can meet the signal requirement of an electronic hand brake arranged in an existing hybrid vehicle on a clutch system.

An electromagnetic flow rate transducer of no insulated measurement tube consists of a rigid measurement tube with internal diameter of D to let fluid to be measured flow through and an excitation unit set on rigid measurement tube for generating magnetic field B vertical to fluid flowing direction. It is featured as generating induction potential E of fluid with flowing speed V in said tube under action of magnetic field B, setting a and B measuring points in action scope of magnetic field B to directly lead output signal X out for measuring.

The invention discloses a traveling-wave regenerative-feedback oscillation system, belonging to the technical field of vacuum electrons. The oscillation system consists of noise, an electronic gun, an electron beam converging module, an isolator, a slow-wave circuit, a coupler, an attenuator, a phase shifter and a radio-frequency output module. Electron beams generated by the electronic gun are converged, and then acts mutually with the noise passing through the slow-wave circuit; amplified signals are output by the coupling end of the coupler and pass through the attenuator and the phase shifter, and the signals with the amplitude and the phase changed by the attenuator and the phase shifter act mutually with the noise and the electron beams again; and circulating so, the signals can pass through the coupler and are outputted by the radio-frequency output module, so that required radio-frequency signals are generated. The traveling-wave regenerative-feedback oscillation system disclosed by the invention overcomes the defects of difficult adjustment and instability of the output frequency in the prior art, has the advantages of high power and efficiency, low cost, small size, easy processing and implementation and the like, and has obvious advantages from submillimeter waves to the terahertz frequency band.

The invention discloses an intra-tube phase-separated-type two-phase fluid electromagnetic flow meter measuring device and method. The measuring device and method are used for determining each phase flow of a two-phase fluid composed of a conductive phase such as surface water and industrial water and a non-conductive phase such as air, natural gas and oil; the device is mainly composed of a measuring pipeline, a mixer, a total flow metering device, a phase separation device, a section phase volume fraction measuring device, an electromagnetic flow meter and a signal processor; the method comprises the steps that a separation state with a clear phase boundary is formed by the adoption of an intra-tube phase separation technology, wherein the intra-tube central core is the non-conductive phase and the outer ring is the conductive phase, and the flow measuring is conducted. By the adoption of the intra-tube phase-separated-type two-phase fluid electromagnetic flow meter measuring device and method, the signal output of the electromagnetic flow meter is more stable without being influenced by the two-phase fluid types and the change of the non-conductive phase positions, and an electrode part cannot be polluted by the non-conductive phase; the phase volume fraction is easier to measure under the separation state, the errors are smaller, and the widespread application to projects is facilitated.

The present invention discloses a exploring tube sensor signal simulator in petroleum well drilling MWD system, which includes a constant voltage module and seven channel identical structure circuit, which are used to simulate seven channel signal of the sensor as OUTGX, OUTGY, OUTGZ, OUTMX, OUTMY, OUTMZ, OUTT, and each channel analog signals circuit includes a signal conditioning circuit and a follower. The present invention is provided with advantages like output signal of the sensor signal simulator stable, accuracy high, no restrict to external conditions like parameter correction, environment and calibration frame when testing the exploring tube circuit, can measure exploring tube circuit conveniently, accurately and fully, and enhance exploring tube circuit test efficiency.

The invention relates to a miniature high-precision angle sensor, which includes a housing, a rotating shaft and an end cover connected to the housing, a first bearing and a second bearing are installed inside the housing, the rotating shaft extends into the housing through the end cover and It is rotationally connected with the first bearing and the second bearing, and the first brush and the second brush are installed on the rotating shaft between the first bearing and the second bearing through the installation connector. The first brush Between the second brush and the second bearing, a resistor body is installed on the rotating shaft through a conductive rivet, and the first brush and the second brush are respectively connected to the corresponding surfaces of the rivet and the resistor body. The sliding contact, the resistor body is connected to the outgoing signal line. The invention is compact in structure, has the characteristics of small structural elements, light weight, stable and reliable output signal, and can guarantee its use safety in the specified use period and specified use environment.

The invention discloses a mass spectrometer power circuit with adjustable radio frequency, which is formed by a programmable signal source circuit, a drive circuit, a radio frequency voltage transformation circuit, an impedance transformation circuit and a controlled voltage source circuit, and is characterized in that the programmable signal source circuit outputs a high-frequency signal, the high-frequency signal is amplified through the drive circuit to drive a switch tube of the radio frequency voltage transformation circuit, the on and the off of the switch tube can enable a high-frequency transformer connected with the switch tube to primarily produce periodic current change, and changed current is coupled through a radio-frequency transformer to secondary output. One path of high voltage output secondarily is transmitted to a load quadrupole rod and provides high-voltage radio-frequency voltage for the load quadrupole rod. The other path of the high voltage output secondarily is transmitted to the impedance transformation circuit. The impedance transformation circuit converts a high-voltage alternating current signal into a low-voltage direct current signal and transmits the low-voltage direct current signal to a feedback end of a controlled voltage source. A radio-frequency power supply can set the frequency of a signal source through software and adjust the output voltage of the controlled voltage source through a potentiometer so as to achieve the aim of controlling the frequency and the output voltage of the radio-frequency power supply.

The invention relates to a non-contact type gear sensing device which comprises a gear shifting pulling arm and a gear sensor, wherein the gear shifting pulling arm is fixedly connected with a magnetic induction device; the gear sensor is arranged in the position within the induction range of the magnetic induction device; the gear sensor and the magnetic induction device are respectively and independently mounted; when gear shifting is performed, the magnetic induction device rotates along with the gear shifting pulling arm, the position of the magnetic induction device relative to the gear sensor is changed, and the change of magnetic flux of the magnetic induction device is received by the gear sensor, so that monitoring of the gear sensor to the change of gear information is realized, accuracy and stability in an output signal are realized, and the service life of the gear sensor is long.

The invention aims to provide a power supply device of a universal charger, which has the advantages of reasonable structure design, stable performance and low cost. The power supply device comprises a rectifying and filtering circuit, a converter and an output circuit which are sequentially connected, wherein, the rectifying and filtering circuit is connected with a starting circuit. The power supply device is characterized in that the rectifying and filtering circuit, the converter and the starting circuit are respectively connected with a flyback switching power supply integrated circuit. As the flyback switching power supply integrated circuit is adopted, output signals are stable, and the reliability and the working efficiency are improved. The power supply device of the invention is one of the ideal power supply devices of the universal charger at present.

The invention relates to a position sensor for a non-contact clutch, which solves the problems that the poor contact existing in the prior position sensor of the non-contact clutch leads to poor operational reliability and so on, The position sensor for the non-contact clutch comprises a shell, a rotor, a circuit board and so on, wherein a magnetic steel ring is arranged in the cylindrical rotor, the inner wall of the magnetic steel ring is symmetrically provided with two permanent magnet blocks respectively, and a cavity is formed between the two permanent magnet blocks; and the middle part of the circuit board is connected with an A Hall chip and a B Hall chip through two conducting member bars respectively, and the A Hall chip and the B Hall chip are positioned in the cavity between the two permanent magnet blocks. The sensor solves the problem of contact wear and prolongs service life; the sensor has good linear output characteristic and ensures that an output signal is more accurate and stable; the adopted Hall chips have functions of programmable property and temperature compensation, can flexibly change parameters of output voltage according to the requirement of customers, and automatically compensate and calibrate the magnetic field drift when the magnetic field intensity of a magnet drifts with the change of the temperature.

The invention discloses a differential to single-ended convertor. The differential to single-ended convertor comprises an amplifying circuit, a phase inverting circuit, and a superposed circuit, wherein the amplifying circuit is used for receiving a first input signal and a second input signal, outputting a first amplified signal after amplifying the first input signal, and outputting a second amplified signal after amplifying the second input signal, wherein the phase of the first input signal is opposite to the second input signal; the inverting circuit is used for receiving the second amplified signal and outputting the second phase-inverted amplified signal after inverting the phase of the second amplified signal; and the superposed circuit is used for receiving the first amplified signal and the second phase-inverted amplified signal and outputting a superposed signal after superposing the first amplified signal and the second phase-inverted amplified signal. The differential to single-ended convertor can be applied to a radio-frequency circuit.

The invention is applicable to battery protection, and provides a discharging current hardware protection circuit for a vehicle-mounted lithium battery pack of an electric vehicle. The discharging current hardware protection circuit comprises a signal sampling unit used for sampling the load current of the electric vehicle, and converting the sampling current into a sampling voltage to output; a detection unit used for outputting a high-level signal when the detected sampling voltage achieves a preset threshold value; and a hardware protection unit used for cutting off the connection between the lithium battery group and the vehicle load after the high-level signal is detected. According to the discharging current hardware protection circuit, when the lithium battery group of the vehicle is in short-circuit or overcurrent states, the hardware protection unit can response in time to automatically cut off the connection between the lithium battery group and the vehicle load; furthermore, due to the introduction of positive feedback to the detection unit, the output signal is relatively stable; in case that the detection unit determines that the lithium battery is in abnormal, the high level is output; even if the current fluctuation is not affected; the output signal is kept the same; and the output signal can be changed only by adopting software for unlocking.

A formaldehyde detecting apparatus includes a formaldehyde sensor configured to measure concentration of formaldehyde in air; a printed circuit board on which the formaldehyde sensor is disposed, the printed circuit board including a signal processor configured to process a signal output from the formaldehyde sensor; a fixing member disposed on the printed circuit board, the fixing member configured to fix the formaldehyde sensor, wherein the fixing member prevents the formaldehyde sensor from oscillating with respect to the printed circuit board by external vibration; and a power supply configured to supply a voltage capable of stabilizing an output signal to the signal processor.

The invention discloses an electric-assisted bicycle axle torque sensor and a treadmill frequency sensor system; through this system, the moment of the middle axis, speed and direction can be measuredaccurately and sensitively; in this system, a planetary gear that transmits torque, the outer ring of the sun gear of a planetary wheel is pedaled on the central axis, according to the deceleration ratio. This moment acts on the elastic element with strain gauge. Four strain gauges are attached to the elastic element to form a full bridge circuit. The position of the strain gauge is determined byfinite element analysis. When the elastic element is subjected to the force on the central axis, the strain gauge resistance changes, the output voltage changes, and the real-time moment can be judged by the output voltage. The rotational speed and direction of the system are realized by Hall effect, so the positive and negative reversal can be judged by judging the phase difference of the waveform of adjacent gears. The sensor of the invention has the advantages of high sensitivity, stable signal, less process consumption and higher precision.