看了贵刊95年第3期刊登张卫的《电视信号发生器》一文后,对比我自己设计的信号发生器,觉得该电路复杂了些,功能少了些。现将我设计的电路介绍给大家参考。电路原理:如图,电路由BG1、BG2组成多谐振荡器,产生低频信号,其振荡频率约216Hz,波形为不对称的方波。BG3组成电感三点式高频振荡器,其振荡频率由L2、L3、C4(或C5)组成的回路决定,并巨受C3、L1送来的低频信号调制。同时BG3接成射极输出,能与后级较好地匹配。 After reading the article entitled “TV Signal Generator” published by Wei in the 3rd issue of 1995, comparing the signal generator designed by myself, I think the circuit is more complex and less functional. Now I introduce the circuit design for your reference. Circuit Theory: As shown in the figure, the circuit consists of BG1, BG2 multivibrator, resulting in low-frequency signals, the oscillation frequency of about 216Hz, the waveform is asymmetric square wave. BG3 composed of inductive three-point high-frequency oscillator, the oscillation frequency by the L2, L3, C4 (or C5) composed of the loop, and greatly affected by C3, L1 sent to the low-frequency signal modulation. At the same time BG3 then become emitter output, with a better match.