补充2 AD DA转换

补充2 AD DA转换

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Unformatted text preview: 9.1 A/D D/A / / / CD ADC ADC ADC V- F DAC DAC T DAC DAC* DAC* DAC* n d n-1 d n-2 d - =---- = + + + = 1 2 2 1 1 2 2 ... 2 2 n i i i n n n n n d d d d D d n-1 d n-2 d v O - = = 1 2 n i i i O d k v 9.2 D/A D 3 D 2 D 1 D 0 V O 0000 0V 0001 0.25V 0010 0.5V 0011 0.75V 0100 1V 0101 1.25V 0110 1.5V 0111 1.75V 1000 2V 1001 2.25V 1010 2.5V 1011 2.75V 1100 3V 1101 3.25V 1110 3.5V 1111 3.75V 9.2.1 D/A v O R F (R/2) A- + 2 3 R 2 2 R 2 R R I I 1 I 2 I 3 d d 1 d 2 d 3 i V REF S S 1 S 2 S 3 V- V + LSB MSB o f v iR = - i f V R R = -- V V + = A - i i + = = A +- i V- V + R f v o R v i i- i + - V V + = = S i d =1 V REF d =0 i REF i i R V d I = ) ( 1 1 2 2 3 3 4 2 2 2 2 2 d d d d V R i v REF F O + + +- =- = v O R F (R/2) A- + 2 3 R 2 2 R 2 R R I I 1 I 2 I 3 d d 1 d 2 d 3 i V REF S S 1 S 2 S 3 V- V + LSB MSB 1 1 2 2 3 3 3 3 2 1 1 2 3 2 2 2 2 2 2 2 2 2 d d d d R V R V d R V d R V d R V d i REF REF REF REF REF + + + = + + + = V REF R F n n REF n n n n n REF O D V d d d V v 2 2 2 2 2 2 2 1 1- = + + +- =---- n v O R F (R/2) A- + 2 3 R 2 2 R 2 R R I I 1 I 2 I 3 d d...
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This note was uploaded on 12/02/2010 for the course ECE ece210 taught by Professor Ece during the Spring '10 term at University of Illinois, Urbana Champaign.

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补充2 AD DA转换

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