Patent ID: 8520785
Filing Date: 2013-08-27
Classification: H04B

Abstract:
1. A multimode receiver comprising a transconductance amplifier having an input terminal and adapted to receive a voltage RF signal and to deliver a current RF signal; a current mixer coupled to the transconductance amplifier and adapted to receive the current RF signal, the current mixer being further adapted to combine the current RF signal with a signal generated by a local oscillator, the mixer generating an intermediate frequency signal having a frequency that equals a combination of a frequency of the current RF signal and a frequency of the local oscillator; a low-pass filter coupled to the mixer and adapted to generate a low-pass current signal; a transimpedance amplifier coupled to the low-pass filter and adapted to receive the low-pass current signal, the transimpedance amplifier being adapted to generate an intermediate frequency voltage signal proportional with the low-pass current signal, wherein the multimode receiver includes; a first switch adapted to receive a signal proportional with the intermediate frequency voltage signal at a first end, a second end being coupled to the input terminal; and a second switch coupled between the input terminal and a reference terminal; the first switch and the second switch being mutually exclusive in an ON state in a specific mode of operation of the multimode receiver.