OSCILLATION-TYPE SENSOR AND EXCITATION METHOD FOR THE OSCILLATION-TYPE SENSOR

摘要

PROBLEM TO BE SOLVED: To provide an oscillation-type sensor having a large S/N ratio which is hardly affected by magnetic fields or other environmental conditions, and to provide an excitation method for the oscillation-type sensor.;SOLUTION: In the oscillating type sensor for measuring physical quantities from the resonance frequency of a sensor output voltage from the sensor and feeding back the amplitude of the sensor output voltage, a programable gain amplifier for amplifying the sensor output voltage with a plurality of gains is provided.;COPYRIGHT: (C)2006,JPO&NCIPI