Patent ID: 8130033

Claim:
An integrated circuit device for selectively amplifying only one of multiple input signals at a time, said integrated circuit device comprising: a plurality of first transistors comprising corresponding first control nodes, each of said first transistors receiving a corresponding one of said multiple input signals; a second transistor electrically coupled in series to each of said first transistors and comprising a second control node; and a control circuit electrically coupled to said first control nodes of each of said first transistors and to said second control node of said second transistor, said control circuit selectively and individually turning on a first control node of only a selected one of said first transistors so as to process said only one of said multiple input signals and transmit said only one of said multiple input signals to said second transistor and, during said turning on of said selected one of said first transistors, further shorting all others of said first transistors to ground and simultaneously turning on said second control node of said second transistor such that only said selected one of said first transistors amplifies a received input signal and then transmits said received input signal to said second transistor for further amplification, wherein by selectively and individually turning on said first control node of only said selected one of said first transistors, while all others of said first transistors are shorted to ground, said control circuit selectively forms different cascode amplifiers, on demand.