短语词组短語switchcapacitor demodulate 開關電容解調qam demodulate qam 解調digital demodulate 數字解調to demodulate 解調soft demodulate 軟解調nto demodulate 解調difference demodulate 差分解調quadrature demodulate 正交解調demodulate detail 使檢波 返回 demodulate