Patent ID: 6400209
Filing Date: 2002-06-04
Classification: G05F,H02J,H03K

Abstract:
A switch circuit including an input terminal and an output terminal, the switch circuit comprising:a MOS transistor connected between the input and output terminals; a gate drive circuit connected to a gate of the transistor to provide a gate drive signal thereto, wherein the gate drive circuit responds to a first control signal provided to the switch circuit and causes the gate drive signal to have one of a first drive voltage, which is derived from a voltage at the input terminal, and a low potential power supply level; and a back gate drive circuit connected to a back gate of the transistor for providing a back gate drive signal thereto having substantially the same phase as the gate drive signal, wherein the back gate drive circuit controls a voltage of the back gate drive signal in accordance with whether the transistor is activated or deactivated.