n.外差作用

The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非线性光学领域,超外差原理就是著名的差频产生(DFG)技术。

Using this CO2 laser, the experiment of three-frequency heterodyning is suooefully carried out. 利用该激光器,成功地进行了三频外差测量研究。

But by using a heterodyning architecture, the Harvard researchers demonstrated twin quantum cascade lasers, whose mixed output is in the terahertz gap. 然而,通过采用超外差架构,哈佛的研究人员证明,两个量子级联激光器的混合输出可以覆盖太赫兹频段。

Again, due to the nature of heterodyning in the first detector,“holes” were left in the incoming radio spectrum when it mixed with the localoscillator. 再一次地，因为第一检波极里外差作用的特性所致，当与本振信号混合时，在输入频率的范围内会出现死点，这导致有些电台完全无法被受到。

The carrier signal injection method and the heterodyning algorithm for the extraction of high frequency current containing rotor space-position information are all discussed. 讨论了载波信号的注入、提取以及包含转子位置信息的高频负序电流的外差处理技术。

(electronics) produced by heterodyning two oscillations. （电学）由两股不同频率的交替电流联合产生。