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前面,我们已讨论了PAL制彩色电视信号的解码方式和解码器各组成部分的工作原理。这里再介绍一个解码器的整机电路。图12-1和图12-2是金星C51-401型彩色电视接收机解码器部分的方框图和电原理图(其亮度放大和基色矩阵即视放部分已在第十一讲中刊出,这里就不重复了)。金星112型和312型彩色电视机的解码电路与此基本相同,该电路在国产彩色电视机解码器中具有一定的代表性。
In the foregoing, we have discussed the decoding method of the PAL color television signal and the working principle of each component of the decoder. Here to introduce a decoder circuit. Figure 12-1 and Figure 12-2 are block diagrams and electrical schematics of the Venus C51-401 color TV receiver decoder section (the brightness magnification and primary color matrix, which are shown in the eleventh section, are listed here It is not repeated). Venus 112 and 312 color TV decoding circuit and this is basically the same, the circuit in the domestic color TV decoder has a certain representation.