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在彩色电视机中,12V供电质量对电视机影响非常大,12V供电主要包括电压值、稳定性及脉动杂波幅度等指标。12V供电来自于开关电源或行输出变压器(比如:NC—2T、F91PP等机芯来自于开关电源;M11、83P、L851等机芯来自于行输出变压器)。一般经过保险电阻或限流电阻、快恢复二极管整流、电解电容滤波而获得。为了提高电视机的性能,有的12V供电还要经过稳压电路稳压(如:83P、NC—2T、M11、F91PP机芯),常见稳压方式有:三极管加稳压二极管及三端
In color TV sets, the quality of 12V power supply has a great influence on the TV sets. The 12V power supply mainly includes such indicators as voltage value, stability and ripple amplitude. 12V power supply from the switching power supply or line output transformer (such as: NC-2T, F91PP and other movements from the switching power supply; M11, 83P, L851 and other movements from the line output transformer). Generally after insurance resistance or current limiting resistor, fast recovery diode rectifier, electrolytic capacitor filter obtained. In order to improve the performance of the TV, some 12V power supply also go through the regulator circuit regulator (such as: 83P, NC-2T, M11, F91PP movement), the common voltage regulator are: Transistor plus Zener diode and three terminal