3b) Refer to Figure 3(b). RF is 10k a variable resistor. If RF is adjusted so that the non-inverting input voltage of the operational amplifier V* = 1.28V, determine: i) the range of allowable input voltage Vin ii) voltage resolution iii) conversion time to iv) the lighted LED when Vin = 2.26V v) the input voltage Vin when digital output = 010101112 8+5V VIN(+) Vcc D₁ w 1ΚΩ 1ΚΩ LED 7 LED 6 ADC D W VIN(-) 0804 D5 1ΚΩ LED 5 w + Σ 2.5ΚΩ A. Gnd 1kg LED 4 D4 w 1ΚΩ LED 3 V/2 ref D3 w 1ΚΩ LED 2 Vz 2.5V 10ΚΩ Rp V+ CLK out D₂ W 1ΚΩ LED 1 10ΚΩ D₁ w 1ΚΩ LED 0 CLK in Do ww 150pF 10ΚΩ CS INTR 74HCT14 START RD D. Gnd WR 3.3μµF Figure 3(b)
3b) Refer to Figure 3(b). RF is 10k a variable resistor. If RF is adjusted so that the non-inverting input voltage of the operational amplifier V* = 1.28V, determine: i) the range of allowable input voltage Vin ii) voltage resolution iii) conversion time to iv) the lighted LED when Vin = 2.26V v) the input voltage Vin when digital output = 010101112 8+5V VIN(+) Vcc D₁ w 1ΚΩ 1ΚΩ LED 7 LED 6 ADC D W VIN(-) 0804 D5 1ΚΩ LED 5 w + Σ 2.5ΚΩ A. Gnd 1kg LED 4 D4 w 1ΚΩ LED 3 V/2 ref D3 w 1ΚΩ LED 2 Vz 2.5V 10ΚΩ Rp V+ CLK out D₂ W 1ΚΩ LED 1 10ΚΩ D₁ w 1ΚΩ LED 0 CLK in Do ww 150pF 10ΚΩ CS INTR 74HCT14 START RD D. Gnd WR 3.3μµF Figure 3(b)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:3b) Refer to Figure 3(b). RF is 10k a variable resistor. If RF is adjusted so that the
non-inverting input voltage of the operational amplifier V* = 1.28V, determine:
i) the range of allowable input voltage Vin
ii) voltage resolution
iii) conversion time to
iv) the lighted LED when Vin = 2.26V
v) the input voltage Vin when digital output = 010101112
8+5V
VIN(+)
Vcc
D₁
w
1ΚΩ
1ΚΩ LED 7
LED 6
ADC
D
W
VIN(-)
0804
D5
1ΚΩ LED 5
w
+
Σ 2.5ΚΩ
A. Gnd
1kg LED 4
D4
w
1ΚΩ
LED 3
V/2
ref
D3
w
1ΚΩ
LED 2
Vz
2.5V
10ΚΩ
Rp
V+
CLK out
D₂
W
1ΚΩ
LED 1
10ΚΩ
D₁
w
1ΚΩ LED 0
CLK in
Do ww
150pF
10ΚΩ
CS
INTR
74HCT14
START
RD
D. Gnd
WR
3.3μµF
Figure 3(b)
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