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作为收音机重要组成部分的调谐电路和本振电路一直采用传统的电容、电感手动调台方式,传统的数字调谐收音机大多都是采用微控制器(MCU)+锁相环(PLL)+调谐器的结构方案。本文介绍了利用数字锁相频率合成技术构成收音机的电调谐部分并阐述了收音机基本设计原理。
As an important part of the radio tuner circuit and local oscillator circuit has been used traditional capacitive, inductive manual tuning method, the traditional digital tuned radio are mostly MCU (MCU) + PLL (PLL) + tuner Structure program. This paper introduces the use of digital phase-locked frequency synthesizer to form the radio tuner and describes the radio basic design principles.