Voltage detection and control circuit
A voltage detection and control circuit technology, applied in the direction of measuring current/voltage, measuring devices, electrical components, etc., can solve problems such as changes in input signal amplification, hidden dangers in the application of fixed gain amplifier circuits, and affecting the gain of dynamic amplifiers, etc., to reach the detection range Large, wide range of effects
Active Publication Date: 2018-07-10
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology
[0016] Obviously, through the gain expression, it can be found that the gain of the dynamic amplifier and V DD Related, during the use of the actual circuit, the power supply voltage is likely to be under different DC voltages. Even if a voltage stabilizer is used for voltage stabilization, the fluctuation of the power supply voltage will also affect the gain of the dynamic amplifier. The circuit application of the amplifier brings hidden dangers, resulting in changes in the magnification of the input signal
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0043] Such as image 3 As shown, the present invention includes a reference voltage output buffer module 402, a voltage operation module 403 and a comparator module 404, and the input terminal of the reference voltage output buffer module 402 is connected to the reference voltage V ref , whose output outputs the buffered reference voltage V refbuf To the second input terminal of the voltage calculation module 403; the first input terminal of the voltage calculation module 403 is connected to the external adjustment voltage V Y , under the control of the external clock signal clk, the signals at the first input terminal and the second input terminal are processed to obtain a comparison signal V det =V Y -V refbuf output to the first input of the comparator module 404; the second input of the comparator module 404 is connected to the voltage...
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The invention discloses a voltage detection and control circuit, and belongs to the technical field of the analog integrated circuit. The circuit comprises a reference voltage output buffer module, avoltage operation module and a comparator module, wherein the input end of the reference voltage output buffer module is connected with reference voltage, the output end thereof is connected with a second input of the voltage operation module; the first input end of the voltage operation module is connected with external adjusting voltage, obtains a comparison signal by processing the input signals of the first input end and the second input end thereof, and outputs the comparison signal to the first input end of the comparator module; the second input end of the comparator module is connectedwith a to-be-detected voltage, and obtains a control signal as the output signal of the voltage detection and control circuit by comparing the to-be-detected voltage with the comparison signal. The voltage detection and control circuit disclosed by the invention is large in detection rage and extensive in applicable range, and especially suitable for a dynamic amplifier, the amplification factorof the dynamic amplifier which cannot change along the change of the power voltage is obtained in a certain change range of the power voltage, thereby acquiring the dynamic amplifier capable of resisting power voltage fluctuation and stable in gain.
Description
technical field [0001] The invention belongs to the technical field of analog integrated circuits, and relates to a voltage detection and control circuit, which is especially suitable for the detection of dynamic amplifier power supply voltage fluctuations and the correction of gain under power supply voltage fluctuations. Background technique [0002] The progress of integrated circuit technology has continuously increased the working speed of digital circuits, increased the integration density, and gradually reduced the power supply voltage. The data representing the comprehensive performance of digital circuits has been significantly improved; The performance that has the greatest impact is the amplifier. As a basic module widely used in analog circuits, on the one hand, technological progress has produced many non-ideal effects of CMOS devices, which have a greater impact on sensitive analog circuits; on the other hand, the reduction of power supply voltage has limited t...
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Login to View More IPC IPC(8): H03F1/30G01R19/165
CPCG01R19/16576H03F1/301
Inventor 宁宁靳泽熙罗建夏华松李靖吴克军
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA