CONCURRENT DUAL-BAND RECEIVER AND COMMUNICATION DEVICE HAVING SAME

摘要

A concurrent dual-band receiver includes a front-end subsystem and a concurrent dual-band down-converter. The front-end subsystem supplies radio frequency signals in a first frequency band and a second frequency band. The concurrent dual-band down-converter includes a dual-band frequency synthesizer, a first down-converting circuit, and a second down-converting circuit. The dual-band frequency synthesizer simultaneously generates first local oscillation signals having a first local oscillation frequency and second local oscillation signals having a second local oscillation frequency. The first down-converting circuit mixes the radio frequency signals with the first local oscillation signals to down-convert the radio frequency signals to base band signals, and outputs the down-converted signals from the first frequency band. The second down-converting circuit mixes the radio frequency signals with the second local oscillation signals to down-convert the radio frequency signals to base band signals, and outputs the down-converted signals from the second frequency band.