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1.本文介绍一种供单管彩色电视摄象机编码用的简易PAL制编码器,它具有电路简单、体积小,而技术指标又不太低的特点。全部编码器包括矩阵电路、调制器、副载波晶振以及副载波形成电路,它们都装在一块面积为30×10cm~2的印刷电路板上。为了便于调整,编码器还配有一块面积为10×10cm~2的集成化的彩条信号发生器。2.此编码器中的两个色差信号的平衡调制器采用了国产5G33D双差分对线性集成电路。这种调制器调整简单而需要的副载波幅度仅为200mV,因此简化了副载波形成电路以及减少了副载波对其他电路的串扰。3.此编码器是专配单管彩色工业摄象机的。而此种摄象机输出的视频信号是Y、
1. This article introduces a simple PAL encoder for single-tube color TV camera encoding, which has the characteristics of simple circuit, small size, and technical indicators are not too low. All encoders include a matrix circuit, a modulator, a subcarrier crystal and a subcarrier forming circuit, all mounted on a printed circuit board with an area of 30 × 10 cm 2. In order to facilitate the adjustment, the encoder is also equipped with an integrated color bar signal generator with an area of 10 × 10cm ~ 2. 2. This encoder in the two color balance signal modulator using a domestic 5G33D double differential linear integrated circuits. This modulator is simple to adjust and requires only sub-carrier amplitude of 200mV, thus simplifying the formation of subcarrier circuits and subcarriers to other circuits to reduce crosstalk. 3. This encoder is equipped with a single tube color industrial camera. The camera output video signal is Y,