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在彩电小信号处理集成电路中,特别是扫描和亮度处理集成电路,大多设有X射线保护、ABL自动调整、行逆程脉冲输入、白平衡自动检测、黑电平嵌位等专用检测引脚,当这些专用引脚被检测的电压、脉冲、电流发生异常,造成被检测电路的电压、电流超出规定范围,被检测的脉冲异常或丢失时,在小信号处理集成电路内部具有相应的保护功能,进入保护状态。近几年由于微处理器总线系统在彩电中的应用,有的小信号处理保护电路,还可通过总线系统与微处理器联动,实现待机保护。由于小信号处理电路的不断发展,集成度不断增大,自动检测、调整、保护的功能不断完善,其检测引脚也不断增加,保护功能不断增多,
In color TV small signal processing integrated circuits, especially scanning and brightness processing integrated circuits, most of them are equipped with X-ray protection, ABL automatic adjustment, line reverse pulse input, white balance automatic detection, black level special detection pin , When these special pins are detected voltage, pulse, current abnormalities, resulting in the detection circuit voltage, current exceeds the specified range, the detected pulse abnormalities or lost, the small signal processing integrated circuit within the corresponding protection function , Enter the protection state. In recent years due to the microprocessor bus system in the TV application, and some small signal processing protection circuit, but also through the bus system and microprocessor linkage, to achieve standby protection. Due to the continuous development of small signal processing circuits and the increasing integration, the functions of automatic detection, adjustment and protection are continuously improved, the detection pins thereof are continuously increased, the protection functions are continuously increasing,