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频率合成器在无绳电话机中,主要为接收电路中的第一混频器提供第一本振频率;为发射电路中的调制器提供调制基准频率,同时发射机的调制信号又加入到频率合成器电路中的VCO部分,与VCO共同组成调频振荡器。
In a cordless telephone, the frequency synthesizer mainly provides a first local oscillator frequency for a first mixer in a receiving circuit, a modulation reference frequency for a modulator in a transmitting circuit, and a transmitter’s modulated signal in turn to a frequency synthesizer VCO part of the circuit, together with the VCO FM oscillator.