Rock quartz accelerometer servo-circuit
A technology of accelerometer and servo circuit, which is applied in the field of servo circuit, can solve the problems that cannot meet military or special requirements, cannot meet the requirements of increasingly miniaturized, poor capacitance detection accuracy, etc., and achieve low noise, good linearity, and high precision high effect
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[0018] The present invention will be further described in detail below with reference to the drawings and embodiments.
[0019] See figure 2 A specific servo circuit structure of the quartz accelerometer of the present invention includes an integrated part and a discrete part. The integrated part 100 includes a triangular wave generator 10, a differential capacitance detector 20, an integrating amplifier 30, and a transconductance amplifier 40. The discrete part includes a negative feedback circuit 200 and an external time base capacitor Ct 1 , External time base resistance Rt 1 And external bias resistor Rb 1 The negative feedback circuit 200 is connected between the inverting input terminal IN2- of the integrating amplifier 30 and the output feedback terminal FB of the transconductance amplifier 40 to form a complete closed-loop test system with deep negative feedback, which can accurately measure small changes in differential capacitance .
[0020] The differential capacitance...
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