基于單片機(jī)的數(shù)控直流恒流源的設(shè)計畢業(yè)設(shè)計開題報告-展示頁
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【正文】 ，轉(zhuǎn)換精度高。這樣就形成了反饋調(diào)節(jié)，提高輸出電流的精度。圖3DAC7625P具有較高的精度。圖4 選擇參考電壓 =，采樣電阻 。= 即D/A轉(zhuǎn)換器數(shù)字輸入量每增加數(shù)值1。步進(jìn)減1mA同理。然而這只是理想情況，實(shí)際電路由于種種原因，實(shí)際輸出電流不會完全等于理論計算值，此時電流反饋控制起了關(guān)鍵作用。工作計劃：第一周()熟悉課題、收集相關(guān)資料第二周()收集、消化相關(guān)資料第三周()擬訂設(shè)計方案、方案比較第四周()撰寫開題報告第五周()提交畢業(yè)設(shè)計開題報告，參加開題第六周()設(shè)計方案細(xì)化、方案改進(jìn)第七周()硬件電路設(shè)計第八周() 硬件電路設(shè)計第九周()軟件設(shè)計第十周() 軟件設(shè)計第十一周() 軟硬件調(diào)試 第十二周() 軟硬件調(diào)試，軟硬件設(shè)計改進(jìn)第十三周()撰寫設(shè)計報告書第十四周() 撰寫設(shè)計報告書、完成初稿（電子版）第十五周()設(shè)計報告書修訂第十六周()完善畢業(yè)設(shè)計第十七周()提交正式設(shè)計報告書（打印版），參加論文互評第十八周()提交正式設(shè)計報告書（打印版），參加畢業(yè)答辯 四、主要參考文獻(xiàn).[1] 唐俊翟. 單片機(jī)原理和應(yīng)用[M]. 北京:冶金工業(yè)出版社,2003[2]宋浩 ,田豐 單片機(jī)原理及應(yīng)用[M]. 北京:清華大學(xué)出版社,2005[3] 曾 波．?dāng)?shù)控恒流源．電子世界，第九期，2005[4] 何希才．電子電路．北京：北京航空航天大學(xué)出版社，2003[5] 李義府．模擬電子技術(shù)基礎(chǔ)．長沙：國防科技大學(xué)出版社，2004[6] 李朝青．單片機(jī)原理及接口技術(shù)．北京：北京航空航天大學(xué)出版社，1994[7] 王福瑞．單片微機(jī)測控系統(tǒng)設(shè)計大全．北京：北京航空航天大學(xué)出版社，1998[8] Engineering School of Science and Technology in Anhui .The Principal amp。 Application of Single Chip Microputer(Manual data At89c51)Features：? Compatible with MCS51? Products? 4K Bytes of InSystem Reprogrammable Flash Memory Endurance: 1,000 Write/Erase Cycles? Fully Static Operation: 0 Hz to 24 MHzThreeLevel Program Memory Lock? 128 x 8Bit Internal RAM32 Programmable I/O Lines? Two 16Bit Timer/CountersSix Interrupt Sources ? Programmable Serial ChannelLow Power Idle and Power Down ModesDescription:The AT89C51 is a lowpower, highperformance CMOS 8bit microputer with 4K bytes of Flash Programmable and Erasable Read Only Memory (PEROM). The device is manufactured using Atmel’s high density nonvolatile memory technology and is patible with the industry standard MCS51? instruction set and pinout. The onchip Flash allows the program memory to be reprogrammed insystem or by a conventional nonvolatile memory programmer. By bining a versatile 8bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microputer which provides a highly flexible and cost effective solution to many embedded control applications.The AT89C51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16bit timer/counters, a five vector twolevel interrupt architecture,a full duplex serial port, onchip oscillator and clock circuitry. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports twosoftware selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning.
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