Step power is the key for step magnetic potential , the pulse width modulate technology that selects the triangle wave as the carrier and ladder sine wave as the modulate wave is researched , furthermore the design of the actuator drive adopts dsp as the digital controller is introduced 步进电源是产生步进磁势的关键，文章研究了三角波为载波，阶梯正弦波为调制波的脉宽调制技术，进而介绍了采用dsp组成全数字控制器，完成步进电源触发的执行器驱动器的设计。
A voltage signal tria ( tt / pw ) added by normal noise . is demonstrated for 2 - d dependence of the waveform on time and trials and 2 - d dependence of spectrum on frequency and trials to show different time domain and frequency domain properties of a random process including noise and signal 以加上准常态杂讯之三角波电压讯号为例，图示含有杂讯电压讯号其波形随时间及试验之二维变动及频谱随频率及试验之二维变动，显示杂讯与讯号之随机过程在时域与频域之不同特性。
( 2 ) the properties of displacement measurement based on self - mixing interference are mathematically analyzed . first , how the external phase influences upon the output frequency , intensity , power and line - width is discussed . then , the output signal ' s properties modulated by four waves , including sine wave , square wave , triangular wave and saw tooth wave , is discussed ( 2 )通过数值分析讨论了自混合干涉位移测量系统的基本特性，包括外腔相位对输出光频、输出强度、输出功率、谱线宽度的影响，以及正弦波、方波、三角波、锯齿波调制反射体位移时输出信号的特点。
The experiment apparatus has been developed , which is based on software ( labview ) and hardware ( pci board ni 6024e ) . the displacements and generative force at the tip of the ipmc actuators were measured with respect to the different voltages , frequents and various waveforms which include square , sinusoidal , and triangular wave 实验选取了不同电压幅值,不同频率的方波、三角波、正弦波三种波形作为电激励信号,利用高速摄像记录ipmc的位移变形,并通过力传感器实测了ipmc试样末端的输出力。
A voltage signal tria ( tt / pw ) added by zero mean uniform noise . is demonstrated for 2 - d dependence of the waveform on time and trials and 2 - d dependence of spectrum on frequency and trials to show different time domain and frequency domain properties of a random process including noise and signal 以加上均匀杂讯之三角波电压讯号为例，图示含有杂讯电压讯号其波形随时间及试验之二维变动及频谱随频率及试验之二维变动，显示杂讯与讯号之随机过程在时域与频域之不同特性。
A modulated signal of tria ( tt / pw ) added by a normal noise . is demonstrated for 2 - d dependence of the waveform on time and trials and 2 - d dependence of spectrum on frequency and trials to show different time domain and frequency domain properties of a random process including noise and signal 以三角波电压讯号加上准常态杂讯乘以无杂讯载波之调变讯号为例，图示含有杂讯电压讯号其波形随时间及试验之二维变动及频谱随频率及试验之二维变动，显示杂讯与讯号之随机过程在时域与频域之不同特性。
Consequently , an integrate switch mode power supply with high efficiency and good reliability can be realized by the controller with very few external parts . the fundamental principle of monolithic voltage - mode switching regulator is firstly introduced in this thesis , which is followed by a comparison between voltage - mode and current - mode converters where the pros and cons of both converters are discussed in detail ; next , the global system architecture is proposed upon the design requirements and sub - block circuits are also introduced that focuses on several essential sub - blocks such as amp , wave , pwm control , psc , osc and vref . finally , all sub - circuits and the whole chip circuit are simulated by hspice whose results indicate that the circuit function and performance have perfectly satisfied the design requirements 在论文中,首先阐述了电压控制模式pwm开关电源的基本原理,对比了电流控制模式和电压控制模式,分析了各自的优缺点;随后根据设计要求进行了电路的总体设计,完成了各个子电路的原理分析,电路设计和仿真验证,重点阐述了误差放大电路、三角波发生电路、 pwm控制电路、节能控制电路、振荡电路和基准源电路的分析、设计和验证过程;最后,利用eda软件hspice对整体电路进行了功能仿真验证,仿真结果表明,本文完成了设计工作,达到设计要求。
Subcircuit models are designed and simulated , which includes bias current source , voltage reference , error amplifier , pwm comparator , driver circuit , protection circuits for over - temperature , over - current . at last , combined with periphery component , the circuit is simulated , and the result meets the anticipant requirement 并对集成电路内的各个模块包括电流偏置电路、基准电压电路、误差放大电路、三角波振荡发生电路、 pwm比较电路、驱动电路、过热保护电路和过流保护等进行了具体的设计和仿真,并对整体应用电路进行了仿真,结果均达到了预先设定的指标。
First , we calculate out the zero point in a simple numeral method , then we get the phase according to the fact that the symbol of phase changed is opposite in the positive - slope and the negative - slope of triangle wave . this method has the following characteristics : easy to calculate , simple to realize and high precision 首先用简单的数值方法较准确的计算出零点时刻;进而根据三角波扫频时正程和逆程相位变化符号相反的特性,巧妙的完成了相位计算,该方法具有计算简单、实现方便、准确度高等特点。
The general signal sources represented by arbitrary waveform generator ( awg ) have become the most popular instruments in modern testing domains . awg can not only generate conventional waves such as sine wave , triangle wave , square wave , etc , but also generate unconventional waves such as linear frequency modulation wave , phrase modulation wave , amplitude modulation wave etc , the most important , it can create arbitrary wave 由于它可产生包括各种理想及非理想的波形信号，不但可以产生纯净的正弦波、方波、三角波等常规波形，而且可以产生线性调频、调相、调幅信号以及程控占空比的低占空比方波，更为重要的是，能够根据用户测试需求生成任意波形。
