Patent ID: 7755222
Filing Date: 2010-07-13
Classification: H03K

Abstract:
1. A circuit for use in an alternating current signal switch comprising: a first field effect transistor having a gate, a source, and a drain, the drain coupled to a first reference node for receiving the alternating current signal; a second field effect transistor having a gate, a source, and a drain, the source of the second field effect transistor coupled to a second reference node and the drain of the second field effect transistor coupled to the source of the first field effect transistor; a first gate resistor coupled to the gate of the first field effect transistor; a second gate resistor coupled to the gate of the second field effect transistor; a DC restoring circuit operable to provide a DC offset to a respective voltage of the gates of the first and second field effect transistors and to maintain the first and second field effect transistors in pinch-off mode when desired, comprising: a third reference node operable to receive a control voltage for controlling the first and second field effect transistors, the third reference node coupled to the second end of the resistor and the cathode end of the diode.