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本文介绍一种采用脉冲钳位电路和环形调制器的小型彩色电视发射机。采用脉冲钳位电路,恢复视频信号的直流分流,保证已调信号不会出现电平漂移和调制度变化;采用环形调制器,能获得良好的线性和较深的调制度。从而可以获得清晰稳定的图像和悦耳的伴音。
This article describes a small color TV transmitter using a pulse clamp circuit and a ring modulator. The pulse clamping circuit is used to recover the DC shunt of the video signal to ensure that no level drift and modulation variation occur in the modulated signal. The use of a ring modulator can achieve good linearity and deep modulation. So you can get a clear and stable image and sweet sound.