Patent ID: 7787852
Filing Date: 2010-08-31
Classification: H04B

Abstract:
1. A radio frequency (RF) transceiver comprises: a low noise amplifier and blocking module coupled to: a down conversion module coupled to convert the desired inbound RF signal into an inbound signal based on a receive local oscillation; an up conversion module coupled to convert an outbound signal into an outbound up converted signal based on a transmit local oscillation; a power amplifier module coupled to amplify the up converted signal to produce an outbound RF signal, wherein the blocking RF signal component corresponds to the outbound RF signal; and a local oscillation module coupled to produce the receive local oscillation and the transmit local oscillation, wherein the local oscillation module includes a notch filter module coupled to attenuate signal components of the receive local oscillation at frequencies corresponding to harmonics of the blocking RF signal component, in which the notch filter module performs harmonic attenuation on the receive local oscillation prior to coupling the receive local oscillation to the down conversion module.