需要金幣： 1000 個金幣 |
資料包括：完整論文 |  |
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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字數(shù)：11610 |  | |
| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:本次設(shè)計的對象是一個三位半直流數(shù)字電壓表，量程為0~1.999V，誤差為5 ‰V。該設(shè)計主要由3位A/D轉(zhuǎn)換器、七路達林頓驅(qū)動器、七段譯碼/鎖存/驅(qū)動器、基準電源和顯示器組成。工作原理：A/D轉(zhuǎn)換器將輸入的模擬信號轉(zhuǎn)換成數(shù)字信號；由基準電源提供精密電壓，供A/D轉(zhuǎn)換器作參考電壓；在段驅(qū)動信號和位驅(qū)動信號共同作用下在顯示器上顯示所要測量的直流模擬電壓。當(dāng)被測電壓超過基準電壓時，過量程信號輸出低電平，從而使顯示數(shù)字熄滅，指示過量程狀態(tài)。 三位半數(shù)字電壓表具有高精度、抗干擾能力強、低功耗、讀書清晰直觀等特點，是生產(chǎn)和實驗中最常使用的測量儀器之一。 關(guān)鍵詞：直流數(shù)字電壓表；3位A/D轉(zhuǎn)換器；驅(qū)動器；基準電源
Abstract:The design of the object is a three and a half DC digital voltage meter, range is 0 ~±1.999V, error is 5‰V. This design mainly consists of 3bit A/D converter, seven Darlington Driver, seven segment decoding / latch / driver, the reference power source and display. Working principle: A/D converter converting the input analog signal to digital signal; by the reference power supply voltage, for A/D converter as the reference voltage; the segment drive signals and a drive signal common role in the display shows the measured DC analog voltage. When the measured voltage exceeds the reference voltage, over range signal output low level, so that the display digital extinguished, indicative range state. Three semi-digital voltage meter has the advantages of high precision, strong anti-jamming ability, low power consumption, reading is visual and clear features, is the production and experiment the most frequently used instrument. Key words: DC digital voltage meter；3bit A / D converter；Driver；Reference power |
