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Then, on the basis of the functional verification, the system architectures of the radio frequency analog front end and the control logic circuit for the passive UHF RFID transponder are studied and designed with low-power design techniques. The RF AFE circuit includes rectifier, matching network, backscatter, regulator, AM demodulator, voltage reference, local oscillator and power on reset circuit, and so on. The control logic circuit contains clock synchronization module, decoding module, coding module, cyclic redundancy checksum module, power management unit, control unit, shift register and memory.

然后，在功能验证的基础上，重点研究了无源超高频射频识别标签芯片射频模拟前端电路和控制逻辑电路的系统架构，并采用低功耗设计技术对其进行了设计，射频模拟前端电路设计包括了整流器、匹配网络、反向散射电路、稳压器、AM解调器、电压参考源、本地振荡器以及上电复位电路等，控制逻辑电路设计包括了时钟同步模块、解码模块、编码模块、CRC校验模块、功率管理单元、控制单元、移位寄存器和存储器等。

In second part of this paper, the damped harmonic oscillator system is studied by implementing normal ordering method.

第二部分，应用正规序方法研究了受迫谐振子问题。

The system is made up by silicon crystal oscillator,frequency divider,number counter,decipherer,LED indicator and calibrated circuit and utilizes the medium-sized and small-sized integrated chip.

本系统由石英晶体振荡器、分频器、计数器、译码器、LED显示器和校分电路组成，采用了中小规模集成芯片。

In order to reduce the low frequency noise, the feedback circuit was improved by adding oscillator and demodulator.

为了有效减小低频噪声，在反馈回路里加入了振荡器和解调器。

B Consider the density matrix of a harmonic oscillator at finite temperature .

考虑有限温度下的简振子的密度矩阵。

A design method of the microwave low phase noise dielectric resonance oscillator is presented in this paper.

介绍了微波低相位噪声介质振荡器的设计方法。

The chip size is 1.15mm×0.75mm with a phase detector using Gilbert cell and a differential ring voltage controlled oscillator using cross-coupled negative resistance.

芯片采用吉尔伯特结构的鉴相器和交叉耦合负阻差分环形压控振荡器，总面积为1.15mm×0.75mm。

Then, in order to trade off between the cost and performance of super-fine phase when realizing the low-jitter low-power high-performance frequency synthesizer for Ethernet application, a novel dynamic voltage-mode phase interpolator with 8-stage differential ring VCO has been provided satisfying the requirement of transmitter and receiver simultaneously. The chip has been implemented in SMIC 0.18-um standard CMOS process and achieved an RMS jitter of 11ps with the crystal oscillator reference RMS jitter of 16ps.

接着，在实现以太网低抖动低功耗高性能的频率综合器设计中，为了有效解决超精细相位性能与成本的矛盾，提出一种新颖的动态电压模相位内插电路，与8级环振VCO相配合，为系统同时满足发送与接收需求起到至关重要的作用。

The traditional analog frequency-sweeping instrument, which mostly uses the LC circuit as the frequency oscillator, is more expensive, too much bigger and heavy to carry. It can only display the curve of amplitude-frequency, but can't used to measure the phase-frequency, and can't used to print the curve of frequency response characteristic either. It brings many discommodity to the user.

传统的模拟式扫频仪大多是用LC电路构成扫频振荡器，它不仅价格昂贵，体积庞大，而且只能显示幅频特性曲线，不能得到相频特性曲线，更不能打印被测网络的频响曲线，给使用者带来诸多不便。

The dither deviation of the master oscillator frequency is unidirectional and lower than the undithered frequency.

主振荡器的频率抖动偏差是单向的，比undithered频率较低。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。