Lecture: DIGITAL SYSTEMS Chapter 10: Oscillator and Timer Nguyen Thanh Hai, PhD University of Technical Education Faculty of Electrical & Electronic Engineering Oscillator and Timer 10.1
Trang 1Lecture:
DIGITAL SYSTEMS
Chapter 10:
Oscillator and Timer
Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
10.1 Oscillator Using Logic Gates
10.3 Oscillator Using IC 555
10.4 Monostable Circuit Using IC555
10.2 Monostable Circuit Using Logic Gates
Trang 2Oscillator using NAND gate
Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
V CC
V CC
C1
C2 R1
R2
R
1
2
Q
Q A
B
V CC
V CC
C1
C2 R1
R2
R
1
2
Q
Q A
B
10.1 Oscillator Using Logic Gates
Trang 3C C
C 1 = 2 =
R R
R 1 = 2 =
C R R C
R R T
T
T = 1 + 2 = 2 ( + 3 ) ln 2 = 1 , 4 ( + 3 )
10.1 Oscillator Using Logic Gates
Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
Oscillator with inverse
gate of Schmitt trigger
10.1 Oscillator Using Logic Gates
Trang 4Oscillator with inverse gate of Schmitt trigger
IH OH
IL OH
V V
V V
RC T
T T
−
−
=
=
= 2 1 2 2 2 ln
Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer 10.1 Oscillator Using Logic Gates
Trang 5Nguyen Thanh Hai, PhD
10.1 Oscillator Using Logic Gates
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
R C
VCC
VCC
1
0
V
RC RC
T = ln 2 = 0 7
Monostable circuit using NAND gate
10.2 Monostable Cicuit Using Logic Gates
Trang 6Nguyen Thanh Hai, PhD
Monostable circuit using NAND gate
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
RC RC
T = ln 2 = 0 7
10.2 Monostable Cicuit Using Logic Gates
Monostable circuit using NOr gate
Trang 710.2 Monostable Cicuit Using Logic Gates
Nguyen Thanh Hai, PhD
Monostable
circuit using
NOr gate
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
10.3 Oscillator Using IC555
Structure of IC 555
Trang 8Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
10.3 Oscillator Using IC555
Trang 910.4 Monostable Using IC555
Nguyen Thanh Hai, PhD
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
10.4 Monostable Using IC555
Trang 10Nguyen Thanh Hai, PhD
- Answer Review questions at page
- Homework
University of Technical Education
Faculty of Electrical & Electronic Engineering
Oscillator and Timer
The End