論我國(guó)商業(yè)銀行資產(chǎn)證券化的難點(diǎn)及對(duì)策.

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4、matLineSpacingLinesToPointsionParagraphFmatLineSpacingLinesToPoctionParagraI目錄內(nèi)容摘要............................................................................................................................I引言...........

5、................................................................................................................11.系統(tǒng)方案選擇和論證................................................................................................

6、....311基本目標(biāo)........................................................................................................312系統(tǒng)基本方案................................................................................................

7、3121方案選擇和論證...............................................................................32.主要單元電路設(shè)計(jì)........................................................................................................92.1電源電路單元.....

8、...............................................................................................92.2精密基準(zhǔn)源......................................................................................................123.系統(tǒng)的軟件設(shè)計(jì)...

9、.......................................................................................................1331程序流程圖..................................................................................................134.結(jié)論....

10、..........................................................................................................................15參考文獻(xiàn)............................................................................................

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14、cccccccccccccccccccccccccccccccmatLineSpacingLinesToPointsionParagraphFmatLineSpacingLinesToPoctionParagra21系統(tǒng)方案選擇和論證11基本目標(biāo)基本目標(biāo)1)輸出電壓：范圍－12V～＋12V，步進(jìn)0.1V。2)輸出電壓可預(yù)置在－12V～＋12V之間的任意一個(gè)值。3)數(shù)字顯示輸出電壓值。4)為實(shí)現(xiàn)上述幾部件工作，自制穩(wěn)壓直流電源，輸出15V

15、，＋5V。12系統(tǒng)基本方案系統(tǒng)基本方案根據(jù)題目要求，系統(tǒng)可以劃分為輸出部分，人機(jī)接口部分和直流穩(wěn)壓電源。其中輸出部分是由DA轉(zhuǎn)換后再放大得到的，人機(jī)接口包括4個(gè)按鍵和液晶顯示部分，直流穩(wěn)壓電源包括兩組電源[1][1]。121方案選擇和論證方案選擇和論證方案一方案一:三端穩(wěn)壓電源三端穩(wěn)壓電源采用可調(diào)三端穩(wěn)壓電源構(gòu)成直流可調(diào)電源的電路如圖1.1所示。怎樣實(shí)現(xiàn)數(shù)控呢？我們把圖1.1中的可變電阻RP用數(shù)字電位器來(lái)代替，就能實(shí)現(xiàn)數(shù)控了。但由于三端