一、TA7633P的基本功能 TA7633P有两个特点,一是可用作电视多伴音信号接收电路的主要部分,二是在双伴音信号的调频解调中采用锁相环(PLL)方式.其方框图和典型外围电路见图1.TA7633P具有以下十种功能:1.前置放大(复合信号的缓冲放大);2.调频信号限幅;3.锁相环方式调频解调(无噪声电路);4.载波控制信号的放大 First, the basic functions of TA7633P TA7633P has two characteristics, one can be used as a TV receiver audio signal receiving the main part of the second is in the dual audio signal FM demodulation using the phase-locked loop (PLL) method. The block diagram and A typical peripheral circuit shown in Figure 1. TA7633P has the following ten functions: 1. Preamplifier (buffer amplification of composite signal); 2. FM signal amplitude limiting; 3. Phase-locked loop FM demodulation (no noise circuit); 4 Amplification of the carrier control signal