unit-2.1.pdf 555 TIMER INTEGRATED CIRCUIT

This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators. This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable multivibrators.This ppt lecture is about the 555 TImer Integrated circuit and its application. It include concept of Astable, Monostable

1. IC-555 Timer
ARM Processor
Dr Vikas Maheshwari
Professor, ECE Dept

2. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer

3. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Pin Diagram

4. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Pin Description

5. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Internal Diagram

6. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Description

7. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer

8. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Operation…..Contd

9. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer

10. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer-Operating Modes

11. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
555 Timer as Monostable Multivibrator

12. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Monostable Multivibrator

13. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Monostable Multivibrator

14. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Monostable Multivibrator

15. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Uses of Monostable Multivibrator

16. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Monostable Multivibrator……Problem

17. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator

18. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator

19. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator

20. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator

21. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Operation

22. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Operation

23. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Operation

24. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Operation

25. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Analysis

26. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Analysis

27. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator: Behaviour

28. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator

29. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Astable Multivibrator…..Problem

30. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Comparion of Multivibrators

31. Phase Locked Loop (PLL)
ARM Processor
Dr Vikas Maheshwari
Professor, ECE Dept

32. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL) Pin Diagram
(IC-565)

33. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL) : Salient Features
(IC-565)

34. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

35. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

36. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

37. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)

38. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

39. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

40. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

41. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…………..Introduction

42. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL)…..Operation

43. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL): Application

44. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL):Example

45. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Phase Locked Loop (PLL):Example

46. Waveform Generators
Dr Vikas Maheshwari
Professor, ECE Dept
Waveform Generators

47. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Square Wave Generator Using Op amp
TheSquareWaveGeneratorUsingOpampmeanstheastable
multivibratorcircuitusingop-amp,whichgeneratesthesquarewaveof
requiredfrequency.TheFig.2.83showsthesquarewavegeneratorusing
opamp.
Itlookslikeacomparatorwith
hysteresis(schmitttrigger),
exceptthattheinputvoltageis
replacedbyacapacitor.
AsshownintheFigthecomparatorand
positivefeedbackresistorsR
1and
R
2formaninvertingschmitttrigger.

48. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Square Wave Generator Using Op amp
WhenV
oisat+V
sat,thefeedbackvoltageiscalledtheupperthresholdvoltage
V
UTandisgivenas
??????
��=
??????1
??????1+??????2
+??????
�??????�
When V
ois at -V
sat, the feedback voltage is called the lower-threshold voltage
V
LTand is given as
??????
??????�=
??????1
??????
1+??????
2
−??????
�??????�
WhenpoweristurnON,V
oautomaticallyswingseitherto+V
satorto-
V
satsincethesearetheonlystablestatesallowedbytheschmitttrigger.

49. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Square Wave Generator Using Op amp
•WithV
o=+V
satwehave–V
p=V
UTandcapacitorstartschargingtowards
+V
satthroughthefeedbackpathprovidedbytheresistorR
ftotheinverting(-)
input.
•AslongasthecapacitorvoltageV
CislessthanV
UT,theoutputvoltage
remainsat+V
sat.

50. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Square Wave Generator Using Op amp
•AssoonasV
CchargestoavalueslightlygreaterthanV
UT,the(-)inputgoes
positivewithrespecttothe(+)input.
•Thisswitchestheoutputvoltagefrom+V
satto-V
satandwehaveV
p=V
LT,
whichisnegativewithrespecttoground.AsV
oswitchesto-V
sat,capacitor
startsdischargingviaR
f,

51. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Square Wave Generator Using Op amp
•ThecurrentI–dischargescapacitorto0VandrechargescapacitortoV
LT.WhenV
Cbecomesslightlymore
negativethanthefeedbackvoltageV
LT,outputvoltageV
oswitchesbackto+V
sat.
•Asaresult,theconditioninFigisreestablishedexceptthatcapacitornowhasainitialchargeequaltoV
LT.The
capacitorwilldischargefromV
LTto0VandthenrechargetoV
UT,andtheprocessisrepeating.Oncetheinitial
cycleiscompleted,thewaveformbecomeperiodic

52. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Triangular Wave Generator Using Op amp
•Wehaveseenthat,theoutputofintegratorisaTriangularWaveGenerator
UsingOpampifitsinputisasquarewave.
•ThismeansthataTriangularWaveGeneratorUsingOpampcanbeformedby
simplyconnectinganintegratortothesquarewavegeneratorasshowninthe
Fig.
Basically,triangularwave
isgeneratedbyalternatively
charginganddischarginga
capacitorwithaconstant
current.Thisisachievedby
connectingintegratorcircuit
attheoutputofsquarewave
generator.

53. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
•AssumethatV’ishighat+V
sat.Thisforcesaconstantcurrent(+V
sat/R
3)throughC(leftto
right)todriveV
onegativelinearly.
•WhenV’islowat-V
sat,itforcesaconstantcurrent(-V
sat/R
3)throughC(righttoleft)to
driveV
opositive,linearly.Thefrequencyofthetriangularwaveissameasthatofsquare
wave.
Triangular Wave Generator Using Op amp

54. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Sawtooth Wave Generator Using Op amp

55. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Difference in between Sawtooth and Triangular Wave Forms

56. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Sawtooth Wave Form Generator Using Op-Amp
The triangular wave generator can be converted in to a sawtooth wave
generator by injecting a variable dc voltage into the non-inverting terminal
of the integrator.

57. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Sawtooth Wave Form Generator Using Op-Amp
•In this circuit a potentiometer is used. Now the output of integrator is a
triangular wave riding on some dc level that is a function of R4 setting.
•The duty cycle of square wave will be determined by the polarity and
amplitude of dc level. A duty cycle less than 50% will cause output of
integrator be a sawtooth.
•With the wiper at the centre of R4, the output of integrator is square wave.
Use of the potentiometer is when the wiper moves towards −VEE, the rise
time of the sawtooth become longer than the fall time.
• If the wiper moves towards +VCC, the fall time becomes more than the rise
time.

58. Dr Vikas Maheshwari GURU NANAK INSTITUTIONS TECHNICAL CAMPUS (Autonomous) VLSI
Sawtooth Wave Form Generator Using Op-Amp