Patent ID: 8958189
Filing Date: 2015-02-17
Classification: H01L,H03K

Abstract:
1. A high-voltage semiconductor switch, comprising: a first field-effect transistor having a source, a drain and a gate, and adapted for switching a voltage at a rated high-voltage level, wherein the first field-effect transistor is a normally-off enhancement-mode transistor; a second field-effect transistor having a source, a drain and a gate, connected in series to the first field-effect transistor, wherein the second field-effect transistor is a normally-on depletion-mode transistor; and a control unit connected to the drain of the first field-effect transistor and to the gate of the second field-effect transistor and operable for blocking the second field-effect transistor if a drain-source voltage across the first field-effect transistor exceeds the rated high-voltage level.