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本文讨论了电视机中幅频特性和相位失真的关系,提出了稳定幅频特性较理想的方法—采用微波PIN二极管电控衰减器作AGC受控管,它比普通AGC三极管受控电路的幅频特性稳定性好,提高了图象质量。
In this paper, the relationship between the amplitude-frequency characteristic and the phase distortion in TV set is discussed, and the ideal method of stabilizing the amplitude-frequency characteristic is proposed. The microwave controlled PIN diode electronic attenuator is used as the AGC controlled transistor. Compared with the controlled AGC transistor, Frequency characteristics of good stability, improve the image quality.