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徒弟:请师傅接着分析无绳电话机的专用电路结构和原理。师傅:好!现在我们来分析RANDIX8320无绳电话机主机的专用电路,有关的电路如图8所示。 1.接收与解调电路:一般无绳电话机都采用调频双工方式工作,8320机也一样,接收和发射为两个独立通道。其频率在国家规定的10个频点上。接收与解调电路的功能是将副机发出的调制高频信号接收、放大、鉴频、解调,最后还原出相应的调制信号。8320机中该部分电路由高放管Q1和IC1(MC3361)及外围元件构成,副机发出的信号经天线ANT接收后,进入由C1、T1、T2、T3等组成的输入选频回路,经C2送到Q1
Apprentice: Please master then analyze the structure and principle of the special circuit of cordless telephone. Master: Well, let’s analyze the special circuit of RANDIX8320 cordless telephone mainframe. The related circuit is shown in Figure 8. 1. Receiving and demodulating circuit: General cordless phones are used FM duplex mode, the same 8320 machine, receiving and transmitting as two independent channels. The frequency of the provisions of the state 10 frequency points. The function of receiving and demodulating circuit is to receive, amplify, frequency discriminate, demodulate the modulated high frequency signal sent by the auxiliary machine, and finally restore the corresponding modulated signal. 8320 machine in this part of the circuit by the high-quality control of the tube Q1 and IC1 (MC3361) and external components, the signal emitted by the auxiliary machine after receiving the antenna ANT, into the C1, T1, T2, T3, C2 to Q1