The torquer noise in quartz flexible accelerometer is an unneglectable factor for high precision accelerometer application system

but there are less research on it. Aiming at circuit application requirements of high precision accelerometer

mechanical thermal noise and resonance of torquer coil are considered

build torquer noise circuit model

design verification circuit

test and verify the model. The results of theory and experiment show that the equivalent acceleration produced by mechanical thermal noise has a little influence on system; the resonance of torque coil is related to driving mode and frequency

pulse width modulation（ PWM） drive mode have more influence on than sine drive

resonance current reach the order of magnitude of mA when drive frequency reaches resonance point. The model has good reference value for application of quartz flex accelerometer.