Patent ID: 7453317

Claim:
An amplifier comprising: a load circuit connected to a first power source; a signal input circuit connected to the load circuit and receiving two input signals; and a switch-bias circuit connected between a second power source and the signal input circuit, wherein: the signal input circuit includes two pairs of Metal-Oxide Semiconductor Field Effect Transistors (MOSFETs) which simultaneously receive the two input signals and are respectively connected to two contact points connected to the load circuit, the switch-bias circuit includes a first MOSFET connected to one pair of MOSFETs of the two pairs of MOSFETs which functions as a current source when a first clock signal is activated, and a second MOSFET connected to another pair of MOSFETs of the two pairs of MOSFETs and which functions as a current source when a second clock signal is activated, and wherein the amplifier amplifies the two input signals and outputs the amplified input signals via the two contact points.