Patent ID: 7065329

Claim:
A radio transceiver comprising a transmitter adapted to transmit on a transmit frequency, a receiver adapted to receive on a first receive frequency, and a single frequency generation means for generating a signal at the transmit frequency; a switchable inverter operable to invert or not invert signals, the switchable inverter being adapted to output a first mode in which the transmit frequency is higher than the first receive frequency, a second mode in which the transmit frequency is lower than the first receive frequency, wherein the single frequency generating means comprises a single oscillator, wherein the receiver comprises a direct conversion low IF receiver, wherein the difference between the transmit frequency and the first receive frequency is equal to the low IF, wherein the signal at the transmit frequency is used to down convert a received signal, and wherein the transceiver can switch between a receive state and a transmit state without a nominal frequency of the single frequency generation means being altered.