Patent ID: 7986726
Filing Date: 2011-07-26
Classification: H04B

Abstract:
1. A transceiver for use in an communication system, comprising: a plurality of phase-locked loops (PLLs), each of the PLLs providing a signal at a different frequency; a plurality of mixers, each of the mixers configured to mix the signal generated from a corresponding PLL of the plurality of PLLs with a radio frequency signal to thereby downconvert the radio frequency signal to baseband; a low noise amplifier having a cascode common gate stage, receiving the radio frequency signal and providing a plurality of amplified radio frequency signals to the plurality of mixers, wherein each of the plurality of amplified radio frequency signals being provided to a corresponding one of the plurality of mixers, the low noise amplifier including a corresponding plurality of amplifiers each coupled to a resonant tank and selectively activated by a selection signal; and gate circuitry responsive to the selection signal, the gate circuitry gating the signals provided by the PLLs such that only the signal from a single PLL is provided to one mixer at a given time.