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超外差接收
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超外差接收
Encyclopedia
工学
【通信基础理论】
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superheterodyne receiving
超外差接收
将接收到的已调高频信号(即调制后的高频信号)送到混频器,然后与本地振荡器所产生的高频信号进行混频,在其输出端得到的波形包络形状与输入高频信号相同,但频率却降为某一固定中间频率(简称中频)的信号接收技术。
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cardinal sum
cardinal vowels
carding
carding machine
cardioblast
cardio-cerebrovascular biomechanics
cardio-diaphragmatic region
cardiogenic shock
cardioid
cardioid catacaustic
cardioid coordinate
cardioid curve
cardioid evolute
cardioid inverse curve
cardioid involute
cardioid negative pedal curve
cardioid pedal curve
cardiolipin
cardionatrin
cardionatrine
cardiopulmonary bypass and blood processing devices
cardiopulmonary cerebral resuscitation
cardiopulmonary exercise testing
cardiopulmonary receptors
cardiorenal syndrome,CRS
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