Piezoelectric acceleration sensor's charge amplifier

The utility model relates to a piezoelectric acceleration sensor's charge amplifier, enlarge the module including electric charge voltage conversion module and the operation of homophase proportion. Including an operational amplifier, feedback capacitance and feedback resistance among the electric charge conversion module, feedback capacitance and feedback resistance are between cross -over connection and an operational amplifier's the inverting input end and output. Homophase proportion operation module includes second operation amplifier, potentiometre, compensated resistance and two other resistance, and the resistance summation potential ware cross -over connection of establishing ties constitutes feedback loop in the inverting input end and the output of second operation amplifier jointly, adjusts the gain through the resistance that changes the potentiometre. The utility model discloses can turn into low impedance, high -gain voltage signal with the high impedance electric charge signal that piezoelectric acceleration sensor produced.