Patent ID: 7787843

Claim:
A multiple band direct conversion radio frequency (RF) transceiver integrated circuit (IC) comprises: a multiple band direct conversion transmitter section including: transmit baseband module operably coupled to receive an outbound baseband signal, wherein the transmit baseband module performs at least one of filtering, analog to digital conversion, gain adjust, and phase adjust on the outbound baseband signal to produce a processed outbound baseband signal; and a multiple frequency band transmission module operably coupled to convert the processed outbound baseband signal into an outbound RF signal having a first RF carrier frequency within a first frequency band into in accordance with a first band local oscillation when the multiple band direct conversion RF transceiver IC is in a first mode and operably coupled to convert the processed outbound baseband signal into an outbound RF signal having a second RF carrier frequency within a second frequency band in accordance with a second band local oscillation when the multiple band direct conversion RF transceiver IC is in a second mode; a multiple band direct conversion receiver section including: a multiple frequency band reception module operably coupled to convert an inbound RF signal having the first RF carrier frequency into an inbound baseband signal in accordance with the first band local oscillation when the multiple band direct conversion RF transceiver IC is in the first mode and operably coupled to convert an inbound RF signal having the second RF carrier frequency into the inbound baseband signal in accordance with the second band local oscillation when the multiple band direct conversion RF transceiver IC is in the second mode; and a receiver baseband module operably coupled to receive the inbound baseband signal, wherein the receiver baseband module performs at least one of filtering, analog to digital conversion, gain adjust, phase adjust, and received signal strength measurement on the inbound baseband signal to produce a processed inbound baseband signal; and a local oscillation generation module operably coupled to generate the first frequency band local oscillation when the multiple band direct conversion RF transceiver IC is in the first mode and operably coupled to generate the second frequency band local oscillation when the multiple band direct conversion RF transceiver IC is in the second mode, wherein selection of the first mode or the second mode is based upon wireless communication efficiency.