Patent ID: 7952419

Claim:
A bootstrapped switch circuit, comprising: a switch transistor having a drain configured as an input terminal to receive an input signal; and a voltage-controlled voltage source configured to provide first and second predetermined constant voltages between a gate and a source of the switch transistor in response to a control signal received at a control terminal, wherein the first predetermined constant voltage turns on the switch transistor and is produced in response to a first logic state of the control signal by summing a gate-to-source voltage of a transistor of the voltage source with a voltage across a bidirectional circuit element of the voltage source when current flows in a first direction through the bidirectional circuit element, and wherein the second predetermined constant voltage turns off the switch transistor and is produced in response to a second logic state of the control signal by subtracting from the gate-to-source voltage of the voltage-source transistor the voltage across the bidirectional circuit element when current flows in a second direction through the bidirectional circuit element.