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电子管有线广播扩大机的效率只有30％左右,而晶体管脉宽调制有线广播扩大机的效率可达85％以上,本文分析了晶体管脉宽调制有线广播扩大机的电路原理,并给出实验结果。
The efficiency of the tube cable broadcasting amplifier is only about 30%, while the efficiency of the transistor pulse width modulation cable broadcasting amplifier can reach more than 85%. The circuit principle of the transistor pulse width modulation cable broadcasting amplifier is analyzed and the experimental results are given.