FET-sensor and method for driving such a sensor

摘要

Embedded in a semiconductor substrate, a field effect transistor (FET) (30) has a gate connection (3) linked to a guard ring (8) or a sensitive gate (1). A triggering device (50) switches a semiconductor sensor from a measuring phase to an inactive phase, within which the FET's connections are set at equal potential. An independent claim is also included for a method for triggering a semiconductor sensor.