PIEZOELECTRIC ACCELEROMETER Russian patent published in 2000 - IPC

FIELD: mechanical vibration measurements. SUBSTANCE: accelerometer has piezoelectric converter whose first electrode is connected to second lead of first current-limiting resistor. First lead of first resistor is connected with first lead of second resistor and with gate of field-effect transistor. Source of the latter is connected to first lead of third resistor. Second lead of third resistor is connected to second electrode of piezoelectric converter, to second lead of fourth resistor, to drain of insulated-gate field-effect transistor and, through communicating line, to common lead of power supply and recorder. Field-effect transistor drain is connected to cathode of first current regulator diode, first lead of fifth resistor, and to gate of insulated- gate field-effect transistor. Second lead of fifth resistor is connected to second lead of second resistor and to first lead of fourth resistor. Source of insulated-gate transistor is connected to anode of first current regulator diode and, through communicating line, to cathode of second current regulator diode and to first lead of isolating capacitor. Second lead of capacitor is connected to recorder. Anode of second current regulator diode is connected to power supply. EFFECT: enlarged range of supply currents and voltages, extended dynamic range. 1 dwg