Patent ID: 7672659
Filing Date: 2010-03-02
Classification: H03D

Abstract:
1. A radio frequency receiver having feedback from a mixer of the receiver to an input stage of the receiver, the radio frequency receiver comprising: a low noise amplifier configured to receive a radio frequency signal, the radio frequency signal having a baseband signal carried thereon; a mixer configured to mix the radio frequency signal with a local oscillator signal, the mixer having at least a high-pass output path and a low-pass output path; and a feedback network connecting the mixer to the low noise amplifier, the feedback network providing a feedback signal from the high-pass output path to the low noise amplifier, the feedback signal having the same radio frequency as the received radio frequency signal, wherein the radio frequency receiver is implemented using a common-base low noise amplifier with shunt feedback and the feedback network is connected to a collector of the low noise amplifier.