| 摘要 |
This invention relates to a method of synthesizing a frequency by means of a frequency synthesizer comprising a local oscillator, which generates an output signal, a phase locked loop, which provides a control signal to the local oscillator, and a frequency divider, which divides the frequency of said output signal and provides a frequency divided input signal to the phase locked loop, wherein the method comprises the steps of: providing, in a receiving mode, said output signal to a receiver for tuning thereof; locking, by means of said phase locked loop, the frequency of said output signal to a channel frequency of a channel to be received; and turning off said phase locked loop when said output signal frequency is locked to said channel frequency and keeping the phase locked loop off during a following receive cycle. The invention also relates to a frequency synthesizer and a transceiver respectively, for performing the method. |
