Patent ID: 8058926

Claim:
A switch comprising: a first transistor comprising a first main terminal connected to a first switch node, a second main terminal connected to a second switch node and a first control terminal, the second switch node being connected to a first clean voltage supply; first control means connected to said first control terminal of said first transistor, comprising a first node connected to said first clean voltage supply, a second node connected to a second voltage level, and a first control input node for receiving a first input control signal variable between a supply voltage level and a third voltage level, said first control means comprising two series-connected transistors and being arranged to selectively connect said first control terminal of said first transistor to one of said first and second nodes based on said first input control signal, wherein coupled main terminals from each of the series-connected transistors apply voltage to the first control terminal and the first transistor and first control means are configured to reduce effects of parasitic capacitance from at least the first transistor in the switch; a second transistor comprising a third main terminal connected to said first switch node, a fourth main terminal connected to a third switch node, and a second control terminal, said third switch node connected to a first differential input node of an amplifier; and second control means connected to said second control terminal of said second transistor, said second control means comprising a third node connected to said first clean voltage supply, a fourth node connected to said second voltage level, and a second control input node for receiving a second input control signal variable between said supply voltage level and said third voltage level, said second control means arranged to selectively connect said second control terminal of said second transistor to one of said third and fourth nodes of said second control means based on said second input control signal.