Patent ID: 8369805
Filing Date: 2013-02-05
Classification: G05F,H01L,H02M,H03F,H03G,H03H,H03K,H04B

Abstract:
1. A circuit for amplifying radio frequency signals, the circuit comprising: a first circuit configured to amplify a radio frequency (RF) signal to provide a first gain; a second circuit configured to amplify the RF signal to provide a second gain; a switch formed as a complementary metal oxide semiconductor (CMOS) device and including a source, a drain, a gate between the source and the drain, and a first well formed about the source and drain, the switch capable of being in a first state or a second state for yielding the first gain or the second gain, respectively; and a coupling circuit that couples the first well to at least one of the source and drain, the coupling circuit configured to allow a bias voltage applied to the first well to be substantially fixed relative to a bias voltage applied to the at least one of the source and drain in the first and second states of the switch.