1 Construct a table similar to Table 16.2 for a 4-bit A/D converter if Va = 5 V with a reference voltage of 16 V. Analog input VI Clock Vo Sample-and-hold + na Va Vb 4-bit SAR 4-bit DAC 4-bit register Logic control Ring counter (a) 4-bit A/D converter MSB B3 B₂ B₁ Bo LSB Output

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1 Construct a table similar to Table 16.2 for a 4-bit A/D converter if Va = 5 V with a reference voltage of 16 V.
Analog
input
VI
Clock
Vo
Sample-and-hold
+
FUL
Va
Vb
4-bit SAR
4-bit DAC
4-bit register
Logic control
Ring counter
(a) 4-bit A/D converter
MSB
B3
B₂
B₁
Bo
LSB
Output
Transcribed Image Text:1 Construct a table similar to Table 16.2 for a 4-bit A/D converter if Va = 5 V with a reference voltage of 16 V. Analog input VI Clock Vo Sample-and-hold + FUL Va Vb 4-bit SAR 4-bit DAC 4-bit register Logic control Ring counter (a) 4-bit A/D converter MSB B3 B₂ B₁ Bo LSB Output
TABLE 16.2 Successive-approximation process for V₁ = 10 V
Step
Comparisons
1
Is V₂ ≥ 8 V?
a
2
3
4
Vb
8 V
12 V
10 V
11 V
10 V
B3 B2 B₁ Bo
1
0
0
0
1
1
0
0
1
0
1
0
1
0 1
1
1
0
1
0
Is V₂ ≥ 12 V?
a
Is V₂ ≥ 10 V?
a
Is V₁ ≥ 11 V?
a
Read output
Answer
Yes
No
Yes
No
Transcribed Image Text:TABLE 16.2 Successive-approximation process for V₁ = 10 V Step Comparisons 1 Is V₂ ≥ 8 V? a 2 3 4 Vb 8 V 12 V 10 V 11 V 10 V B3 B2 B₁ Bo 1 0 0 0 1 1 0 0 1 0 1 0 1 0 1 1 1 0 1 0 Is V₂ ≥ 12 V? a Is V₂ ≥ 10 V? a Is V₁ ≥ 11 V? a Read output Answer Yes No Yes No
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