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101.一 衰減 器之 輸入 訊號 Vi( t) =100cos(1000t)mV, 輸出 信號VO( t) =10cos(1000t)mV, 則此 衰減 器之 電壓 增益 為(A) -10dB(B)
問題詳情
101.一 衰減 器之 輸入 訊號 Vi( t) =100cos(1000t)mV, 輸出 信號VO( t) =10cos(1000t)mV, 則此 衰減 器之 電壓 增益 為
(A) -10dB
(B) 10dB
(C) 20dB
(D) -20dB
參考答案
答案:D
難度:非常困難0
統計:A(0),B(1),C(0),D(0),E(0)
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