Transceiver circuit

A transceiver circuit, comprising:

• a transceiver antenna;
• a transmitter circuit coupled to the transceiver antenna and configured to transmit a radio frequency signal through the transceiver antenna, wherein the radio frequency signal corresponds to a radio frequency;
• a receiver circuit coupled to the transceiver antenna and configured to receive an external signal with the radio frequency through the transceiver antenna;
• a frequency synthesizer coupled to the transmitter circuit and the receiver circuit, comprising only one oscillator, and configured to provide a first local oscillation signal and a second local oscillation signal, wherein the first local oscillation signal has a first local oscillation frequency, and the second local oscillation signal has a second local oscillation frequency;
• and
• a baseband circuit coupled to the transmitter circuit, the receiver circuit and the frequency synthesizer, and configured to operate in a transmitting mode and a receiving mode,
• wherein in the transmitting mode, the baseband circuit is configured to control the frequency synthesizer to provide the first local oscillation signal and provide an input signal to the transmitter circuit, and the transmitter circuit is configured to process the input signal according to the first local oscillation signal, and transmit the radio frequency signal through the transceiver antenna,
• wherein in the receiving mode, the baseband circuit is configured to control the frequency synthesizer to provide the second local oscillation signal, and the receiver circuit is configured to process the external signal according to the second local oscillation signal, and transmit the processed external signal to the baseband circuit,
• wherein the first local oscillation frequency is a non-integer multiple of the radio frequency, and the second local oscillation frequency is an integer multiple of the radio frequency.