Patent ID: 8897727
Filing Date: 2014-11-25
Classification: G01R,H03F,H03G,H04B

Abstract:
1. An apparatus for wireless communication, comprising: at least one metal oxide semiconductor (MOS) transistor configured to receive an input signal at a first gate terminal, detect power of the input signal based on a power detection gain, and provide an output signal indicative of the power of the input signal; a first node configured to receive and apply a variable gate bias voltage to the first gate terminal of the at least one MOS transistor and to a second gate terminal of the at least one MOS transistor, wherein the variable gate bias voltage is applied to the first and second gate terminals of the at least one MOS transistor, in addition to the input signal received at the first gate terminal, to vary gate-to-source voltages of the at least one MOS transistor and to maintain approximately constant power detector gain over temperature; and a second node configured to receive and apply a variable drain bias voltage to the at least one MOS transistor, wherein the variable drain bias voltage is applied to the at least one MOS transistor provide additional control over the output signal.