“超外差接收”的概念、定义、翻译、参考文献-科学参考

单词	超外差接收
释义	超外差接收 Encyclopedia 工学【通信基础理论】释 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。
随便看	product of σ-rings product operation product order product orientation product path product phase product photography product placement Product portfolio strategy Product Positioning product-preserving functor product-principle layout product process matrix product projection product quality audit product quality certification product quality certification system product quality guaranty insurance product quality law Product Quality Law of the People's Republic of China product quality supervision Product recall product recall insurance product recall system Product Research and Development

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。