由两只乙类对称功率放大器组成的桥式功率放大电路如下图所示,图中四只三极管特性相同,同时利用R 1 和R 2 的分压,使B(B')点电位等于V CC /2,试分析电路工作原理并求出R L =10Ω时最大不失真输出功率P om 。
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