Patent ID: 7208993

Claim:
A driver circuit, comprising: a plurality of differential inputs; at least one differential output; a plurality of control inputs; and a multiplexor coupled between the differential inputs and the at least one differential output, the multiplexor being configurable by the control inputs to allow a selected one of the differential inputs to be routed to at least one differential output, the multiplexor including a plurality of transmission gates, each transmission gate including a first pass transistor corresponding to a respective signal path of one of the differential inputs, wherein the multiplexor further includes at least one first blocking element coupled between a back-gate node of each first pass transistor and a supply voltage to block a first leakage current path from the back-gate node to the supply voltage, and at least one second blocking element coupled between a gate node of each first pass transistor and the respective signal path corresponding thereto to block a second leakage current path from the respective signal path to the first pass transistor, a plurality of control circuits configured to provide the control inputs to the multiplexor, wherein each control circuit comprises at least one third blocking element operative to block a third leakage current path to the supply voltage within the control circuit.