METHOD TO MITIGATE UNDESIRED OSCILLATOR FREQUENCY MODULATION EFFECTS IN-SIDE A SYNTHESIZER DUE TO INTERFERENCE SIGNALS AND SYNTHESIZER CIRCUIT

摘要

A synthesizer circuit to generate a local oscillator carrier signal for a baseband signal includes a controlled oscillator comprising a phase lock loop and an oscillator configured to generate an oscillating signal. A pulling compensation circuit is configured to generate a correction signal for a present output of the phase locked loop using information on an error of the oscillating signal, information on a present sample of a baseband signal and a preceding correction signal for a preceding output of the phase locked loop.