短語詞組短語frequency -conversion circuit 頻率變換電路two frequency up conversion 雙頻上轉(zhuǎn)換high frequency power conversion 高頻變換frequency voltage conversion 頻率電壓變換frequency band conversion 頻帶轉(zhuǎn)換frequency alias conversion effect 頻率變換傚應(yīng)frequency up conversion 頻率上轉(zhuǎn)換過程 返回 frequency conversion