第十二章A class B amplifier (not push-pull) （ ）.
答案:conducts through 180° of the input waveform
Crossover distortion in class B amplifiers is prevented by （ ）. The maximum theoretical efficiency of an RC-coupled class A amplifier is （ ）.Power amplifiers are typically used to drive low impedance loads.（ ）The power that an amplifier delivers to a load is equal to the difference between the power that the circuit draws from the power supply and the power that the circuit dissipates.（ ）
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