六、AGC电路,消噪电路和同步分离电路 AGC电路,消噪电路和同步分离电路是电视机电路的重要组成部分,它们在晶体管黑白电视机中的典型应用电路如图10所示。 1.AGC电路我们已在前面的介绍中讲过,为了保证电视屏幕上重现的图像不随输入信号强弱的变化而变化。高频头电路和图像中放电路中分别接有高放AGC和中放 AGC circuit, noise reduction circuit and synchronous separation circuit AGC circuit, noise reduction circuit and synchronous separation circuit is an important part of the TV circuit, their typical application circuit in the transistor black-and-white TV shown in Figure 10. 1.AGC circuit We have already mentioned in the introduction, in order to ensure that the image reproduced on the television screen does not change with the input signal strength changes. High frequency head circuit and the image in the discharge circuit were connected with high AGC and release