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功率放大电路的作用,是把振荡控制电路送来的高频振荡方波放大到足够点亮CCFL背光灯管的功率。1.单端推挽功率放大电路(1)互补对称共集电极单端推挽功率放大电路在各种晶体管功率放大电路(包括功率放大集成电路)中应用最多的是单端推挽功率放大电路。共集电极单端推挽功率放大电路的等效原理图如图1所示。
The function of the power amplifier circuit is to amplify the high frequency oscillating square wave sent by the oscillation control circuit to a level sufficient to light the CCFL backlight tube. 1. Single-ended push-pull power amplifier circuit (1) complementary symmetrical common-collector single-ended push-pull power amplifier circuit In a variety of transistor power amplifier circuits (including power amplifier integrated circuits) is the most widely used single-ended push-pull power amplifier . A total of the collector single-ended push-pull power amplifier circuit shown in Figure 1 equivalent principle.