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飞利浦公司(其网址为www.semiconductor.philips.com)的TDA7000是一种单声道调频收音机集成电路,内含从天线连接端到音频输出端的所有电路。外部元件包括一个供本振用的可调LC电路、几只电容器、两只电阻器以及一只控制可变电容二极管调谐的电位器。该集成电路采用FLL(锁频环)结构。滤波后的调频鉴频器输出对本
The Philips TDA7000 from Philips (www.semiconductor.philips.com) is a mono FM radio IC that contains all the circuitry from the antenna connection to the audio output. The external components include an adjustable LC circuit for local oscillator, several capacitors, two resistors and a potentiometer to control the tuning of the variable capacitance diode. The integrated circuit adopts FLL (frequency locked loop) structure. After the filter FM frequency discriminator output of this