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Ё e ADC(Analog-to-Digital Convertor) DAC(Digital-to-Analog Convertor) i waa i aa a AD/DA eс q wwi ae a. 2. w 1) Ё a Ae ADC DAC qi aС wA wbE ADC DAC i w a a ww i ea. ADC wwa 0 aA 5 a a aia si biЁ e s b aϡai b a. e DAC wwa DAC eСaA eiE ai w a a qai ie i aС, i w qbi eae i e a. b key i be qi e wi baa aa aA a qi e w ea. key be I A aȡ ai aw e key b wi awea. 6 DAC e⸥ w a 1 e e⸥ 4bit DAC a. bs e aq {e a eA a. < a 1. Digital-to-Analog Converter Aҡ > ᶁ Aҡi a wae aq {a. w⸥ OP AMP a ai ae OP AMP b e s a s ae 0 a. e w⸥ OP AMP sb eЁA b AeС A a. aa se 0 aˡa. e w⸥ OP AMP bea bAe Ae 0 qA a. e w⸥ OP AMP A be aA 鈡e wС eЁ a. b wС eЁe A Aa aa ea. A OP AMP e w⸥ OP AMP {e gaa a b Aaqa w⸥ a ea. bE Aȁ w bit a 1e aᶡe hӡ w bit a 0 e aᶡe ia. aa w bit a 1 sA aa w wi aa wA baС s () A ae Aa a aA Ea. wa w bit weight i qa OP AMP be () A aAe Ae w bit a 1 A weight i e Ai sС Ea. Ae OP AMP bea ai qa w a aaA Ea. aa be se b bit A ae s Ea. 6 ADC e⸥ w a 2 e Successive-Approximation ADC a. < a 2. Successive-Approximation ADC > Approximation ADC Ae A we DACi wea. ȡ a aia s a a (Comparator) i aa bEa. a A ae eaAe eс bA e aia s t bE a. e aA ȡ a s a ae b 1 A UP-DOWN counter A UP aae a bA UP-DOWN counter e eс tA 1i ea. 1 ᔁХ te DAC i a a a waE si aС a aA bEa. b e DAC b s a ĩ a eaA A, e a ġA Ae a b 0 A counter e DOWN i aAEa. ^