Patent ID: 7224722

Claim:
A direct conversion Radio Frequency (RF) transceiver integrated circuit comprising: a local oscillator that generates an RF local oscillation signal corresponding to an RF channel; a receiver section operably coupled to the local oscillator to receive the RF local oscillation signal, wherein the receiver section receives an incoming RF signal, and wherein the receiver section down-converts the incoming RF signal based upon the RF local oscillation signal to produce an incoming baseband signal; a transmitter section operably coupled to the local oscillator to receive the RF local oscillation signal, wherein the transmitter section receives an outgoing baseband signal, and wherein the transmitter section up-converts the outgoing baseband signal to produce an outgoing RF signal; and wherein the local oscillator further comprises: a first mixing stage comprising a frequency correcting stage that receives a frequency correction input and the uncompensated local oscillation signal having a reduced magnitude to produce a frequency correction component; and a second mixing stage coupled to receive an uncompensated local oscillation and the frequency correction component output from the first mixing stage wherein the frequency correcting stage adjusts the uncompensated local oscillation signal based upon the frequency correction input to produce the RF local oscillation signal.