介紹了以RC串并聯(lián)選頻網(wǎng)絡(luò)為主振電路的電子琴設(shè)計方法,給出了八音階電子琴電路參數(shù)的設(shè)計方法和一組參數(shù)值。 并采用Multisim10對RC串并聯(lián)正弦波振蕩電路進行了設(shè)計仿真。結(jié)果證明,用模擬電路方法制作電子琴結(jié)構(gòu)簡單,而且成本低廉,符合C音調(diào)基準音標準。
上傳時間: 2014-01-16
上傳用戶:yupw24
收發(fā)器乃新型通訊系統(tǒng)的基本組件,可以用於各種不同裝置包括手機、 收發(fā)器乃新型通訊系統(tǒng)的基本組件,可以用於各種不同裝置包括手機、 收發(fā)器乃新型通訊系統(tǒng)的基本組件,可以用於各種不同裝置包括手機、 WLANWLANWLANWLAN網(wǎng)路橋接器與蜂巢式基礎(chǔ)建設(shè)。
標簽: 向量訊號產(chǎn)生器 收發(fā)器 測試 速度
上傳時間: 2013-10-12
上傳用戶:ligi201200
文中設(shè)計了一個性能良好、結(jié)構(gòu)簡單、成本低廉、維護方便的電子鋸齒波產(chǎn)生器。介紹了這種電子鋸齒波產(chǎn)生器的結(jié)構(gòu),說明了它的工作原理,定量地用自動控制理論分析和推導了它的性能,并介紹了它的檢修思路。
上傳時間: 2015-01-03
上傳用戶:yan2267246
在Multisim 10軟件環(huán)境下,設(shè)計一種由運算放大器構(gòu)成的精確可控矩形波信號發(fā)生器,結(jié)合系統(tǒng)電路原理圖重點闡述了各參數(shù)指標的實現(xiàn)與測試方法。通過改變RC電路的電容充、放電路徑和時間常數(shù)實現(xiàn)了占空比和頻率的調(diào)節(jié),通過多路開關(guān)投入不同數(shù)值的電容實現(xiàn)了頻段的調(diào)節(jié),通過電壓取樣和同相放大電路實現(xiàn)了輸出電壓幅值的調(diào)節(jié)并提高了電路的帶負載能力,可作為頻率和幅值可調(diào)的方波信號發(fā)生器。Multisim 10仿真分析及應用電路測試結(jié)果表明,電路性能指標達到了設(shè)計要求。 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.
上傳時間: 2014-01-21
上傳用戶:shen007yue
WinCE環(huán)境下檢測SD卡序列號,編程環(huán)境: eVC4.0 + PPC2003。 文件清單: 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
上傳時間: 2013-12-21
上傳用戶:爺?shù)臍赓|(zhì)
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.
標簽: signal Modulated analog create
上傳時間: 2015-05-14
上傳用戶: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].
標簽: configuration Processor milindhp tifrvax
上傳時間: 2015-05-24
上傳用戶:wqxstar
《角度測量器》 用光電編碼器測量角度,每個脈沖為0.72度。 測量范圍:0.0~360.0度 為保證不錯過脈沖,用timer1計數(shù),在電平跳變中斷里判斷轉(zhuǎn)動方向,盡量加快處理過程。 數(shù)據(jù)換算和數(shù)碼管掃描顯示在主循環(huán)中實現(xiàn)。 譯碼器用10米長5芯屏蔽線與數(shù)顯器的兩片74HC595連接。 MCU為12F629,使用內(nèi)部4兆RC振蕩和內(nèi)部復位功能。
上傳時間: 2015-06-18
上傳用戶:sclyutian
該程序提供基于hd7279的鍵盤顯示c51源代碼,在調(diào)試過程中首先要檢查rc振蕩電路是否正常-,
上傳時間: 2014-01-26
上傳用戶:sxdtlqqjl
XX7299A是一款低價位且具有強抗干擾能力的多功能單片機外圍芯片。它整合了數(shù)碼管顯示驅(qū)動(8 位數(shù)碼管或者64 位LED)和鍵盤掃描(64個)控制,以及片上256字節(jié)E2PROM和256字節(jié)SRAM ,集成RTC(帶有陰歷和節(jié)氣算法)、2路8位ADC(貼片)。XX7299A內(nèi)置8MHz RC振蕩電路,采用兩線通信接口(兼容I2C)與單片機通信。
上傳時間: 2015-10-07
上傳用戶:xinyuzhiqiwuwu
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