Voltage Level Detector
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![Page 1: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/1.jpg)
Voltage Level Detector
EL2311-Elektronika Analog II (Op-Amp)
![Page 2: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/2.jpg)
Course Topic
• Inverting Positive Voltage Level Detector
• Non Inverting Positive Voltage Level Detector
• Inverting Negative Voltage Level Detector
• Non Inverting Negative Voltage Level Detector
EL2311-Elektronika Analog II (Op-Amp)
![Page 3: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/3.jpg)
Vout ?
• Nilai output tergantung pada besarnya Ed dan Vref
Ed = Vnon-inverting - Vinverting
V +
V -
LR V o
V i
R1
R2
Vref
V i
(+) Input
(-) Input
0 t1 t2 t3 t4t
V o
+Vsat
-Vsat
0 t1 t2 t3 t4t
tLtH
T
Vref
![Page 4: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/4.jpg)
Vref ?
Nilai Vref akan mempengaruhi besarnya duty cycle dari Vout.
Dalam praktiknya, Vref di dapat dengan memanfaatkan tegangan dari power supply.
+Vref = tegangan positive power supply
-Vref = tegangan negative power supply
V +
V -
LR V o
V i
R1
R2
Vref
![Page 5: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/5.jpg)
+Vref
V +
V -
LR V o
V i
R1
R2
Vref
![Page 6: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/6.jpg)
-Vref
V +
V -
LR V o
V i
R1R2 Vref
![Page 7: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/7.jpg)
Positif Voltage Level Detector
• Vref = bernilai positif +Vref
Jika : • Vin < +Vref Vsout = -Vsat • Vin > +Vref Vsout = +Vsat
Vsout = teg. Sebelum output akhir (Vout) masih dalam proses
Vout = tergantung jenis rangkaian (inv. atau non-inv.)
![Page 8: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/8.jpg)
Negatif Voltage Level Detector
• Vref = bernilai negatif -Vref
Jika : • Vin < -Vref Vsout = -Vsat • Vin > -Vref Vsout = +Vsat
Vsout = teg. Sebelum output akhir (Vout) masih dalam proses
Vout = tergantung jenis rangkaian (inv. atau non-inv.)
![Page 9: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/9.jpg)
Perhitungan Duty Cycle
Secara teoritis, bentuk gelombang output sudah bisa langsung didapat.
dengan cara melihat kembali ciri Vout dan mencari besarnya duty cycle.
![Page 10: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/10.jpg)
V i
(+) Input
(-) Input
0 t1 t2 t3 t4t
V o
+Vsat
-Vsat
0 t1 t2 t3 t4t
tLtH
T
Vref
tH = t2 – t1 T = tH + tL Duty Cycle = (tH/T) * 100% D < 50 % Dimana : tH = t saat kondisi HIGH tL = t saat kondisi LOW T = t total 1 gelombang t1, t2, dan t3 didapat dengan menggunakan persamaan garis lurus
![Page 11: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/11.jpg)
Contoh Soal
Diketahui : ± Vss = ±15 Volt ; ±Vsat = ±14 Volt
• Gambarkan karakteristik output-input
• Gambarkan tegangan output Vo
• Hitunglah tH, tL, dan Duty Cycle
V oV i
- +3V
10K(ms)t
0 20 30 5040 6010
-6
6
Vi (Volt)
![Page 12: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/12.jpg)
Titik 1 = (0,0) Titik 2 = (10,6)
t1
(-) Input
(+) Input
(ms)t0 20 30 5040 6010
-6
6
Vi (Volt)
14
-14
0
Vo (Volt)
t1 t2 t3 t4
t1 t2 t3 t4(ms)t
tLtH
T
3
![Page 13: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/13.jpg)
(-) Input
(+) Input
(ms)t0 20 30 5040 6010
-6
6
Vi (Volt)
14
-14
0
Vo (Volt)
t1 t2 t3 t4
t1 t2 t3 t4(ms)t
tLtH
T
3
Titik 1 = (10,6) Titik 2 = (30,-6)
t2
![Page 14: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/14.jpg)
(-) Input
(+) Input
(ms)t0 20 30 5040 6010
-6
6
Vi (Volt)
14
-14
0
Vo (Volt)
t1 t2 t3 t4
t1 t2 t3 t4(ms)t
tLtH
T
3
Titik 1 = (30,-6) Titik 2 = (50,6)
t3
![Page 15: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/15.jpg)
(-) Input
(+) Input
(ms)t0 20 30 5040 6010
-6
6
Vi (Volt)
14
-14
0
Vo (Volt)
t1 t2 t3 t4
t1 t2 t3 t4(ms)t
tLtH
T
3
![Page 16: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/16.jpg)
Latihan
Diketahui : ± Vss = ±15 Volt ; ±Vsat = ±14 Volt
• Gambarkan karakteristik output-input
• Gambarkan tegangan output Vo
• Hitunglah tH, tL, dan Duty Cycle
(ms)t0 20 30 5040 6010
-6
6
Vi (Volt)
V +
V -
V i
86K
22K
10K
![Page 17: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/17.jpg)
EL2311-Elektronika Analog II (Op-Amp)
![Page 18: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/18.jpg)
Non-Inverting Positive Voltage Level Detector
V +
V -
LR V o
V i
R1
R2
Vref
Vref = x (V+) Sedangkan nilai D < 50%
+Vsat
-Vsat
V i
V o
0 Vref
![Page 19: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/19.jpg)
V i
(+) Input
(-) Input
0 t1 t2 t3 t4t
V o
+Vsat
-Vsat
0 t1 t2 t3 t4t
tLtH
T
Vref
V +
V -
LR V o
V i
R1
R2
Vref
Input
![Page 20: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/20.jpg)
Non-Inverting Negative Voltage Level Detector
V +
V -
LR V o
V i
R1R2 Vref
Vref = x (V-) Sedangkan nilai D > 50%
![Page 21: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/21.jpg)
Inverting Positive Voltage Level Detector
Vref = x (V+) Sedangkan nilai D > 50%
V +
V -
LR V o
V i
R1
R2
Vref
![Page 22: Voltage Level Detector](https://reader034.fdocuments.net/reader034/viewer/2022042615/563db9e9550346aa9aa10939/html5/thumbnails/22.jpg)
Inverting Negative Voltage Level Detector
V +
V -
LR V o
V i
R1R2 Vref
Vref = x (V-) Sedangkan nilai D < 50%