混频

There are two different ring oscillators in this accelerometer with the same electrical parameters. The output signal was achieved by subtracting the syntonic frequency of one ring oscillator from that of another.

2为了解决传感器的数字化，本文提出了一种新的环振式数字压力传感器，它采用做在硅梁上的 MOS 环形振荡器作为敏感元件，采用混频器作为片内的信号处理单元，实现环形振荡器的频率相减。

It is showed that the varying gate voltage will change the nonlinear transconductance to get mixer function.

分析了栅压对改变非线性跨导在混频器中的作用。

Optimization of transconductance pair and proper DC bias of input stage are key problems in the design.

本文中对前级电路加以改进，实现了混频器输入级的直流偏置，完成了电路的设计和仿真。

In the end, the linearity improvement on the transconductance stage of the double balanced mixer was researched.

最后针对双平衡混频器跨导输入级电路，进行线性性能改进的研究。

A quadrature down-conversion mixer based on this topology is designed and optimized for an ultra high frequency RFID reader.

设计并优化了一个基于共用跨导级结构的用于超高频RFID阅读器的正交下变频混频器。

Design of CMOS Low Voltage and High Gain Mixer in Ku Wave Band ?

Ku波段低电压高增益混频器的设计 j ，，54

Adelphi Masterfil and Adelphi Coldstream have increased their machine hall space to cope with the demand for its filling capping machines, process vessels and mixers, which are supplied to the oil, food, pharmaceutical and cosmetics industry worldwide.

阿德菲Masterfil和阿德菲科德斯特里姆也增加了机大厅的空间，以应付其灌装封盖机，过程容器和混频器，这是提供给石油，食品，制药和化妆品行业的全球需求。

The third-order optical nonlinearities and lime responses were measured by a phase conjugate forward, 3-dimensional degenerate, four-wave mixing technique. Comparing polymer's third-order NLO coefficient, it shows that the χsuperscript (3 value increasecs with the introduction of the azobenzol side-chain.

通过简并四波混频飞秒激光系统对各个接枝聚合物的三阶非线性极化率系数进行了测定，考察了偶氮侧链的引入对聚合物主链三阶非线性的影响，并考察了侧链上不同取代基的电子效应对主链三阶非线性的影响。

Based on the coupling of the bichromatic field, we observed a large four-wave mixing signal in cold atoms under non-resonance condition, the measured maximum conversion efficiency was about 18%.

在双色场耦合基础上，设计实验在冷原子中观察到非共振耦合情况下的弱光四波混频信号，测到的转换效率为18%。

In chapter 2, the intensity and phase formulae of five photorefractive processes in intermediate regime are derived including the analytic expressions of codirectional parallel-or cross-polarization two-wave mixing in the depleted pump condition and the analytic expressions of contradirectional parallel-or cross-polarization two-wave mixing and degenerate four-wave mixing in the undepleted pump approximation.

给出了本文的结构和取得的主要结果。第二章推出了五种光折变过程的中间段强度与相位公式。既同向平行、交叉极化双光束耦合的大信号解析公式，异向平行、交叉极化双光束耦合以及简并四波混频的小信号解析公式。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了