文中设计了一个性能良好、结构简单、成本低廉、维护方便的电子锯齿波产生器。介绍了这种电子锯齿波产生器的结构,说明了它的工作原理,定量地用自动控制理论分析和推导了它的性能,并介绍了它的检修思路。
上传时间: 2015-01-03
上传用户:yan2267246
在Multisim 10软件环境下,设计一种由运算放大器构成的精确可控矩形波信号发生器,结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变rc电路的电容充、放电路径和时间常数实现了占空比和频率的调节,通过多路开关投入不同数值的电容实现了频段的调节,通过电压取样和同相放大电路实现了输出电压幅值的调节并提高了电路的带负载能力,可作为频率和幅值可调的方波信号发生器。Multisim 10仿真分析及应用电路测试结果表明,电路性能指标达到了设计要求。 Abstract: Based on Multisim 10, this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier, the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor, the width of frequency was adjusted by using different capacitors provided with multiple switch, the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit,the ability of driving loads was raised, the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上传时间: 2014-01-21
上传用户:shen007yue
WinCE环境下检测SD卡序列号,编程环境: eVC4.0 + PPC2003。 文件清单: newres.h ReadMe.txt Resource.h SDTest.aps SDTest.cpp SDTest.h SDTest.rc SDTest.vcc SDTest.vcl SDTest.vcp SDTestDlg.cpp SDTestDlg.h StdAfx.cpp StdAfx.h
上传时间: 2013-12-21
上传用户:爺的气质
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. rc circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
标签: signal Modulated analog create
上传时间: 2015-05-14
上传用户:CHINA526
TIMER.ASM ********* [ milindhp@tifrvax.tifr.res.in ] Set Processor configuration word as = 0000 0000 1010 b. a] -MCLR tied to VDD (internally). b] Code protection off. c] WDT disabled. d] Internal rc oscillator [4 MHZ].
标签: configuration Processor milindhp tifrvax
上传时间: 2015-05-24
上传用户:wqxstar
《角度测量器》 用光电编码器测量角度,每个脉冲为0.72度。 测量范围:0.0~360.0度 为保证不错过脉冲,用timer1计数,在电平跳变中断里判断转动方向,尽量加快处理过程。 数据换算和数码管扫描显示在主循环中实现。 译码器用10米长5芯屏蔽线与数显器的两片74HC595连接。 MCU为12F629,使用内部4兆rc振荡和内部复位功能。
上传时间: 2015-06-18
上传用户:sclyutian
该程序提供基于hd7279的键盘显示c51源代码,在调试过程中首先要检查rc振荡电路是否正常-,
上传时间: 2014-01-26
上传用户:sxdtlqqjl
XX7299A是一款低价位且具有强抗干扰能力的多功能单片机外围芯片。它整合了数码管显示驱动(8 位数码管或者64 位LED)和键盘扫描(64个)控制,以及片上256字节E2PROM和256字节SRAM ,集成RTC(带有阴历和节气算法)、2路8位ADC(贴片)。XX7299A内置8MHz rc振荡电路,采用两线通信接口(兼容I2C)与单片机通信。
上传时间: 2015-10-07
上传用户:xinyuzhiqiwuwu
图像扭曲算法。已经修改过,补充过缺少的rc文件,通过测试,并通过毕业论文
上传时间: 2014-11-22
上传用户:rishian
12864中文字库液晶演示程序 MS12864R 测试程序(串口) 连线表 CPU=89C52 SystemClock=12Mhz CS=P3.0 SCLK=P3.1 SID=P3.2 Reset=rc in Board
标签: 12864 SystemClock 12864R SCLK
上传时间: 2015-11-29
上传用户:yt1993410