30results about How to "Adequate drive capacity" patented technology

The invention discloses an improvement on a light source gatherer device for automatically tracing sun light, and belongs to the new field of an illumination technique of optical fiber use and solar energy utilization. The device comprises a light gathering device, an electromechanical driving device, a sensor, a control system, a lamp light source, optical fibers, a switch and a luminous back lamp. The improvement on the device is characterized in that under the attraction of an magnetic clutch and the worm and gear engagement, the light gathering device is driven to rotate in the plane direction and the vertical direction in a self-locking way; the light gathering device adopts a circular belt type screw lens to gather light, and is provided with an axial fan at the side of a light filter to blow, exhaust and radiate heat; the sensor arranged at the position for checking the sun light sends a control command to a motor and the magnetic clutch of the electromechanical driving device through the control system, and the control command is used for controlling and driving the light gathering device to complete the motion adjustment for tracing any space angle required by the sun light, and controlling the lamp light source, the light filter and a color disc to do rotation at inlet and outlet positions in the horizontal direction, so the device can automatically gather light, collect the sun light source, and convert the lamp light source in sun-shading days.

The invention discloses an excitation power circuit of a rotary transformer, belongs to the field of drive power sources, and solves the problems of complex circuit and incapability of independently working in the traditional excitation power of the rotary transformer. The excitation power circuit consists of a sinusoidal oscillation circuit, an amplitude adjusting circuit and a power amplifying circuit, wherein the sinusoidal oscillation circuit consists of a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor CSEL1, a capacitor CSEL2, a first operational amplifier and a second operational amplifier; the amplitude adjusting circuit consists of a resistor R6, a resistor R7, a resistor RSEL, a capacitor C3 and a third operational amplifier; and the power amplifying circuit comprises a resistor R8 and a power amplifier. The frequency of a sinusoidal excitation power source generated by the circuit of the invention is modulated by selecting a capacitance value of the capacitor CSEL1 and the capacitor CSEL2, and the amplitude value of the sinusoidal excitation power source is adjusted by changing the resistance value of the resistor RSEL. The excitation power circuit of the invention serves as the drive power source of the rotary transformer.

The invention discloses a bias current control method for an operational amplifier. The operation amplifier promotes an internal slew rate through a bias current control system. The bias current control method comprises the following steps of: detecting a slew rate operation signal; judging a signal period of the slew rate operation signal so as to generate a judging signal; and generating a bias modulation signal according to the judging signal and the slew rate operation signal, so that the bias modulation signal can change operation modes of the operational amplifier.

The design method of a TDICMOS imaging unit relates to a design method of a TDICMOS imaging unit, which solves the problems of complex design and poor stability of the existing TDICMOS imaging unit, including a controller unit and a detector unit; the controller unit generates a detector unit The required control signal, and receive the digital image data output by the detector unit; the detector unit includes a TDICMOS detector, an operational amplifier, an LDO, a driver with a Schmitt function, and a level shifter with a Schmitt function device; the present invention is respectively designed for the power supply of the pixel part with the sinking current, the transmission of the digital input control signal, the generation method of the charge transfer driving signal, the placement method of the via hole in the high-density area and the processing of the multi-layer ground plane, the maximum Maximize the utilization area of ​​the circuit board, improve the integrity of the control drive signal and power supply, and avoid risks such as voltage breakdown and virtual soldering.

The invention provides a synchronous rectification driving module, a synchronous rectification driving circuit and a buck-type step-down circuit, which adopts a PMOS power tube as the upper tube of the synchronous rectification circuit, and an NMOS power tube as the lower tube, and improves the PMOS power tube driving circuit and the NMOS power tube. tube drive circuit; the PMOS drive circuit uses direct VCC‑GND power supply; the PMOS drive circuit uses the method of limiting the gate voltage of M18 and making M18 and M19 discharge together to limit the voltage of the gate drive terminal of the PMOS power tube, so as to ensure the driving ability. At the same time, the circuit structure is simplified; the NMOS drive circuit stabilizes the voltage of the gate drive terminal of the NMOS power tube by limiting the base voltage of the transistor Q1, and ensures the gate drive terminal of the NMOS power tube by amplifying the current flowing out of M24 through Q1 and Q2. There is enough driving capacity.

A voltage regulator, which includes a voltage regulation unit and an overdrive unit. The voltage regulating unit outputs a corresponding output voltage according to the input voltage. The overdrive unit includes a voltage comparison circuit, coupled to the output terminal of the voltage regulator, for comparing the output voltage of the voltage regulator with a reference voltage, and outputting an overdrive signal; and an overdrive circuit, coupled to the voltage comparison circuit and the voltage between the input terminals of the adjustment unit, and adjust the input voltage of the voltage adjustment unit according to the overdrive signal, wherein if the output voltage is greater than the reference voltage, the overdrive signal is a low logic level, and the input voltage is a normal level; if the output If the voltage is lower than the reference voltage, the overdrive signal is at a high logic level, and the overdrive unit increases the level of the input voltage.

The invention discloses a hardware Trojan horse test system. The hardware Trojan horse test system comprises a PC, an NI high-speed digital I / O board and a test circuit, wherein the PC is used for generating a test vector, conducting programming on an FPGA chip, controlling the NI high-speed digital I / O board, an oscilloscope and the FPGA chip and receiving signals sent by the NI high-speed digital I / O board and the oscilloscope; the NI high-speed digital I / O board is used for outputting the test vector to the FPGA chip, collecting an FPGA response signal and sending back the FPGA response signal to the PC; the testing circuit comprises the FPGA chip and receives the test vector output by the NI high-speed digital I / O board. The hardware Trojan horse test system further comprises a precise resistor R1, a precise resistor R2, the oscilloscope and a precise voltage-stabilized source, wherein the precise resistor R1 and the precise resistor R2 monitor the power consumption change of the kernel voltage and the auxiliary voltage of the FPGA chip, the oscilloscope is used for automatically triggering and collecting signals of power consumption change of the kernel voltage and the auxiliary voltage of the FPGA chip and sending the signals to the PC; the precise voltage-stabilized source is used for supplying power to the test circuit. The hardware Trojan horse test system conducts automatic tests, improves the precision of logic testing and bypass analysis and is high in application value.

The invention discloses a read-operation control signal generator. The read-operation control signal generator comprises three delay circuits with same structures and different delay time setting; the input terminal of a first delay circuit is connected with internal clock signals, three delayed output signals are generated successively by the delay circuits because of rising edge trigger of external clock signals, and signal saeq is subjected to miteinander with nonsignals of second output signals and first output signals, and then is output via a noninverting amplifier; signal saen1 is output by a noninverting amplifie via first output signals; signal saen2 is output by a noninverting amplifie via third output signals; zero clearing of the three delay circuits can be realized via rising edge trigger of external clock signals, third output signals can be delaed by a fourth delay circuit, and zero clearing signals are lower by the fourth delay circuit so as to realize zero clearing of the three delay circuits. The invention also discloses an operation method of the read-operation control signal generator. The read-operation control signal generator is simple in circuit structure, and is capable of reducing delay skew, domain area, and circuit powder consumption.

The invention belongs to the technical field of mechatronics, and in particular relates to a method for selecting a servo motor for a ball screw feed system. This method first deduces the driving torque expression under the conditions of no-load quick start and maximum cutting load; further determines the range of system gain and the range of inertia of the servo motor; finally completes the selection of the servo motor according to the speed-torque curve. This method fully considers various typical working conditions to ensure that the ball screw feed system has sufficient driving capacity. At the same time, it also pays attention to the motor-load inertia ratio, so that the servo motor can obtain better dynamic performance. This method realizes the fast and accurate selection of the servo motor of the ball screw feeding system, overcomes the problems of relying on experience, low efficiency and inaccuracy of the traditional method, and quickly and accurately selects the servo motor for the ball screw feeding system, and at the same time It provides an accurate and convenient servo motor selection method for on-site engineers and technicians.

The invention discloses a multi-input high-speed CMOS buffer circuit. The buffer circuit comprises a voltage-to-current module, a multipath selector module, and a current-to-voltage module, wherein two sides of the multipath selector module are respectively connected with the voltage-to-current module and the current-to-voltage module, the other side of the voltage-to-current module is used for inputting the voltage, and the other side of the current-to-voltage module is used for outputting the voltage; the voltage-to-current module is used for converting multiple input voltage into a current signal; the multipath selector module is used for conducting the voltage-to-current module and the current-to-voltage module; the current-to-voltage module is used for converting the input current signal into a voltage signal and outputting the voltage signal. The multi-input high-speed CMOS buffer circuit disclosed by the invention has the excellent characteristics of being fast in buffering speed, small in delay, free from using a bootstrapping switch, and strong in usability.

The invention creates and provides an underground power supply and pulse driving circuit of an intelligent drilling tool. The circuit comprises a mud turbine power generator, a three-phase rectification filter circuit, a voltage stabilization circuit, a probe pipe, a signal acquisition circuit, a control circuit and a driving circuit which are sequentially connected, the voltage stabilization circuit is a parallel circuit of n independent voltage stabilization power supplies, each voltage stabilization power supply comprises a loop circuit which is formed by sequentially connecting a flyback transformer, a half-wave rectification filter circuit, a feedback circuit and a pulse width modulation circuit, and the output end of the half-wave rectification filter circuit is connected with the probe pipe. The underground power supply and pulse driving circuit created by the invention has the advantages that an underground power supply and pulse driving system is designed based on a pulse width modulation technology, a flyback switching voltage stabilization power supply is used for electric energy conversion according to power utilization demand of a load to acquire stable DC electric energy output; and a pulse width modulation port of a microprocessor outputs a pulse width modulation waveform with a certain duty ratio value, and the stability of driving current of a pulse signal generator is ensured.