Patent ID: 8299835

Claim:
A circuit comprising: a main switching device including: a main controlling terminal; a first main supplying terminal electrically connected to an input conductor of a signal line; and a second main supplying terminal electrically connected to an output conductor of the signal line; a first control circuit having a first voltage output electrically connected to the main controlling terminal; a shunt switching device for the main controlling terminal, wherein the shunt switching device is electrically isolated from the signal line, the shunt switching device including: a first shunt supplying terminal electrically connected to the main controlling terminal; and a second shunt supplying terminal electrically connected to a high frequency ground; and a second control circuit, distinct from the first control circuit, having a second voltage output electrically connected to a shunt controlling terminal of the shunt switching device, wherein the shunt switching device is configured to provide a low impedance path from the main controlling terminal to the high frequency ground when the main switching device is in an off state.