ANGULAR VELOCITY SENSOR

摘要

An angular velocity sensor the failure of which, if occurred, can be externally detected, and which has a further improved reliability in use. The angular velocity sensor comprises a pair of current amplifiers to which the outputs of sense electrodes are inputted, a differential amplifier for amplifying the difference between the outputs of the paired current amplifiers, a 90 DEG phase-shifter constituting a synchronous demodulator for detecting the output of the differential amplifier synchronously with a monitor signal and for outputting an angular velocity signal, and a synchronous detector. The monitor signal is inputted into an input terminal of a current amplifier through a capacitor serving as an injector in response to an external diagnosis request signal from a control terminal.