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亮度通道是处理亮度信号(Y信号)的电路,总的来说亮度通道是一个0～6MHz的宽带放大器(亮度信号的频率范围为0～6MHz)。为了有较好的频率特性,对高频信号作了些补偿,另外,在通道中还设置了多种控制电路。 电路组成和工作原理 图1是亮度通道电路组成的方框图。输入该通道的是全电视信号FBYS,输出的是Y信号,输入的还有来自行、场扫描电路叠加进来的复合消隐信号。 图2是东芝X—53P机心的亮度通道应用电路,它采用
The luminance channel is a circuit that processes the luminance signal (Y signal). In general, the luminance channel is a 0 to 6 MHz wideband amplifier (the luminance signal has a frequency range of 0 to 6 MHz). In order to have better frequency characteristic, made some compensation to the high-frequency signal, in addition, in the passageway also set up many kinds of control circuits. Circuit composition and working principle Figure 1 is a block diagram of the brightness channel circuit. Input the channel is the full television signal FBYS, the output is Y signal, there are input from the line, field scanning circuit superimposed composite blanking signal. Figure 2 is the Toshiba X-53P movement of the brightness of the channel circuit, which uses