Patent ID: 8779749

Claim:
A circuit for controlling a switch, the circuit comprising: a first capacitive element connected between a first input terminal and a first terminal of a rectifying element, wherein the first input terminal is configured to receive a high-frequency signal of a first amplitude that is referenced to a first potential, and the rectifying element has its second terminal connected to a first output terminal that is configured to be connected to a control terminal of the switch; and a second capacitive element connected in a parallel circuit branch to the first capacitive element and between a second input terminal and a second output terminal, wherein the second input terminal is configured to be connected to the first reference potential and the second output terminal is configured to be coupled to a second reference potential; and a second rectifying element connected between the first terminal of the first rectifying element and the second output terminal, wherein the circuit is configured to generate from the high-frequency signal a D.C. signal of a second amplitude at the first output terminal.