DYNAMIC CONTROL OF CAPACITANCE ELEMENTS IN FIELD EFFECT SEMICONDUCTOR DEVICES

摘要

A field effect device includes at least one segmented field plate, each of the at least one segmented field plates having plurality of segments that each form it plate of a capacitor, wherein the field effect device is connected to an electronic element that dynamically connects selected segments to selectively set a gate-to-drain and a drain-to-source capacitance. An ultrasonic device includes a transducer coupled tc<,> a switching d­evice that switches the transducer between a transmit mode and a receive mode switching device, wherein the switching device includes the field effect device.