Patent ID: 8526635

Claim:
A switch connecting a first signal line and a second signal line comprising: a first isolated n-channel field effect transistor (NFET) with an isolated substrate connection, having a gate and a drain, wherein the drain is coupled to the first signal line; a second NFET having a gate coupled to a control signal and a source coupled to the second signal line, wherein the second NFET is in series with the first isolated NFET; a controlled pull-up circuit operable to receive the control signal, the controlled pull-up circuit coupled to the gate of the first isolated NFET; and a pull-down circuit coupled to the gate of the first isolated NFET; wherein the pull-up circuit pulls up the gate of the first isolated NFET to a positive supply voltage when the control signal is in a high state; and wherein the pull-down circuit pulls the gate of the first isolated NFET down to a negative supply voltage or the voltage of the first signal line when the control signal is in a low state.