Patent ID: 7773026

Claim:
A transceiver, comprising: a first phase-locked loop adapted to receive a reference signal and output a transmission signal that is based on the reference signal, wherein the first phase-locked loop comprises: a first phase frequency detector adapted to generate a first tuning signal based on both the reference signal and a first correction signal; a first variable electronic oscillator adapted to generate the transmission signal based on the first tuning signal; and a first feedback path adapted to generate the first correction signal based on the transmission signal; a second phase-locked loop adapted to receive the reference signal and output a local oscillator (LO) signal that is based on the reference signal, the frequency of the LO signal being shifted relative to the frequency of the transmission signal, wherein the second phase-locked loop comprises: a second phase frequency detector adapted to generate a second tuning signal based on both the reference signal and a second correction signal; a second variable electronic oscillator adapted to generate the LO signal based on the second tuning signal; and a second feedback path adapted to generate the second correction signal based on the LO signal, wherein the first and second feedback paths comprise first and second mixers, respectively, adapted to receive a common offset frequency.