一种数字式彩色电视副载波综合器的设计

A digital sub-carrier synthesizer for color TV

介绍一种适于利用电视信号传送标准时间的数字式彩色电视副载波综合器的设计 ,详细介绍了关键电路———数字混频器的组成、工作原理和输入输出波形 .该电路结构简单、性能稳定、可靠性高 .实际应用证明电路的设计是成功的 .该设计思想可以应用于一切输入频率与要求的输出频率之间没有整倍数关系的频率综合电路中 .

A digital sub-carrier synthesizer for color TV is introduced,which is suitable for standard time delivered by TV signal. Especially,detailed schematic diagram,working principal and waveform diagram of the key circuit-digital mixer are given. The circuit has simple construction,stable performance and good reliability. The idea can be applied to all synthesizers where there is no integer times relation between input frequency and output frequency.