RITTAL CP-6170.010
RITTAL CP-6170.010
偏移二進(jìn)制編碼
偏移二進(jìn)制是一種常用于雙極性信號(hào)的編碼方法。在偏移二進(jìn)制編碼中,負(fù)向zui大值(負(fù)向滿(mǎn)幅值)用全0 (00.。.000)表示,正向zui大值(正向滿(mǎn)幅值)用全1 (11.。.111)表示。零幅由一個(gè)1 (MSB)后邊跟全0 (10.。.000)表示。該方法與標(biāo)準(zhǔn)二進(jìn)制類(lèi)似,后者常用于單極性信號(hào)(參見(jiàn)二進(jìn)制編碼,單極性)。
失調(diào)誤差(雙極性)
雙極性轉(zhuǎn)換器失調(diào)誤差的測(cè)量與單極性轉(zhuǎn)換器失調(diào)誤差的測(cè)量類(lèi)似,但在雙極性傳遞函數(shù)的中間點(diǎn)測(cè)量零幅處的誤差(參見(jiàn)失調(diào)誤差單極性)
失調(diào)誤差(單極性)
失調(diào)誤差常稱(chēng)為“零幅”誤差,指在某個(gè)工作點(diǎn),實(shí)際傳遞函數(shù)與理想傳遞函數(shù)的差異。對(duì)于理想數(shù)據(jù)轉(zhuǎn)換器,*次跳變發(fā)生在零點(diǎn)以上0.5LSB處。對(duì)于ADC,向模擬輸入端施加零幅電壓并增加,直到發(fā)生*次跳變;對(duì)于DAC,失調(diào)誤差為輸入編碼為全0時(shí)的模擬輸出。
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