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【单选题】
某共射极放大电路空载时输出电压有截止失真,在输入信号不变的情况下,经耦合电容接上负载电阻时,失真消失,这时由于( )。A.
Q 点上移
B.
Q 点下移
C.
三极管交流负载电阻减小
D.
三极管输出电阻减小
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A.
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B.
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
Do you like it.
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