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传统彩电中频电路常采用双差分结构的准同步检波电路,优点是电路简单,但在检波过程中易产生失真。所以新型彩电采用PLL完全同步检波方式,提高了检波的真实性,所获得图像信号的轮郭更加鲜明
Traditional color TV frequency circuits often use double differential structure quasi-synchronous detection circuit, the advantage of the circuit is simple, but prone to distortion in the detection process. So the new color TV using PLL full synchronous detection method to improve the detection of the authenticity of the obtained image signal more clear