一.TA7193P工作原理概述TA7193P是用于PAL制的色度信号处理和彩色信号解调的一块中规模集成电路,它的主要功能列入图1的方块图中,其中包括: 1)色信号放大2)直流彩色增益控制(主) 3)直流彩色增益控制(付) 4)色同步脉冲放大器5)色同步脉冲选通控制6)自动彩色控制峰值检波器7)自动彩色控制放大器8)消色检波器9)自动相位控制鉴相器10)压控振荡器11)识别检波器 I. Overview of the working principle of TA7193P The TA7193P is a medium-scale integrated circuit for PAL system of chrominance signal processing and color demodulation. Its main functions are listed in the block diagram of Figure 1, including: 1) 2) DC color gain control (main) 3) DC color gain control (pay) 4) color burst pulse amplifier 5) color burst strobe control 6) automatic color control peak detector 7) automatic color control amplifier 8) Detector 9) Automatic phase control phase detector 10) VCO 11) Identify the detector