INJECTION LOCK ALL DIGITAL FREQUENCY SYNTHESIZER CIRCUIT

摘要

The present invention relates to a technology which divides a frequency synthesizer circuit into a frequency synthesizer circuit unit and an injection locking phase locked loop circuit but, and implement rapid frequency and phase locking by sequentially a frequency synthesizer locking operation and an injection locking operation. An injection locking digital frequency synthesizer circuit includes: a frequency synthesizer to output a reset signal and a second reference clock signal by performing frequency and phase locking operation according to a first reference clock signal and point number information which is received from an outside; and an injection locking phase locked loop reset according to the reset signal input when the frequency synthesizer locks a frequency to start a frequency locking operation, divides the second reference clock signal into a desired frequency of an integer multiple as a reference clock to output a corresponding output clock signal.