Patent ID: 8604862

Claim:
A bootstrapped switch circuit, comprising: a first switch transistor to receive an input signal; a second switch transistor to provide an output signal, wherein a source of the second switch transistor is coupled to a source of the first switch transistor; a voltage source coupled to at least one of a gate of the first switch transistor and a cote of the second switch transistor and coupled to the sources of the first and second switch transistors, wherein the voltage source generates a control voltage to activate at least one of the first and second switch transistors based on a received bias current; and a voltage source driver coupled to the voltage source, wherein the voltage source driver generates the bias current based on a bias voltage, the bias voltage comprising a first voltage approximately corresponding to an overdrive voltage of at least one of the first and second switch transistors and a second voltage approximately corresponding to a threshold voltage of at least one of the first and second switch transistors, wherein the voltage source includes: a sensing element coupled to the sources of the first and second switch transistors, and a circuit element coupled between the sensing element and at least one of the gates of the first and second switch transistors, wherein a voltage drop generated over the circuit element and the sensing element due to the bias current substantially corresponds to the control voltage.