PULSE AND DIGITAL CIRCUITS (Common to EEE,ECE)

UNIT I LINEAR WAVESHAPING : High pass, low pass RC circuits, their response for sinusoidal, step, pulse, square and ramp inputs. RC network as differentiator and integrator, attenuators, its applications in CRO probe, RL and RLC circuits and their response for step input, Ringing circuit.

UNIT II NON-LINEAR WAVE SHAPING : Diode clippers, Transistor clippers, clipping at two independent levels, Transfer characteristics of clippers, Emitter coupled clipper, Comparators, applications of voltage comparators, clamping operation, clamping circuits using diode with different inputs, Clamping circuit theorem, practical clamping circuits, effect of diode characteristics on clamping voltage, Transfer characteristics of clampers.

UNIT III SWITCHING CHARACTERISTICS OF DEVICES : Diode as a switch, piecewise linear diode characteristics, Transistor as a switch, Break down voltage consideration of transistor, saturation parameters of Transistor and their variation with temperature, Design of transistor switch, transistor-switching times.

UNIT IV MULTIVIBRATORS : Analysis and Design of Bistable, Monostable, Astable Multivibrators and Schmitt trigger using transistors.

UNIT V TIME BASE GENERATORS : General features of a time base signal, methods of generating time base waveform, Miller and Bootstrap time base generators – basic principles, Transistor miller time base generator, Transistor Bootstrap time base generator, Current time base generators.

UNIT VI SYNCHRONIZATION AND FREQUENCY DIVISION : Principles of Synchronization, Frequency division in sweep circuit, Astable relaxation circuits, Monostable relaxation circuits, Synchronization of a sweep circuit with symmetrical signals, Sine wave frequency division with a sweep circuit.

UNIT VII SAMPLING GATES : Basic operating principles of sampling gates, Unidirectional and Bi-directional sampling gates, Reduction of pedestal in gate circuits, Applications of sampling gates.

UNIT VIII REALIZATION OF LOGIC GATES USING DIODES & TRANSISTORS : AND, OR gates using Diodes, Resistor, Transistor Logic, Diode Transistor Logic.

Lesson Plan for PDC

Period Topics RemarksUNIT 1 LINEAR WAVESHAPING:

1.High pass RC circuits, their response for sinusoidal, step, pulse,

square and ramp inputs2. Do3. Do

4.Low pass RC circuits, their response for sinusoidal, step, pulse,

square and ramp inputs.5. Do6. RC network as differentiator and integrator7. Attenuators, its applications in CRO probe8. RL circuits and their response for step input, Ringing circuit.9. RLC circuits and their response for step input, Ringing circuit.10. Review & Problems

UNIT 2 NON-LINEAR WAVE SHAPING:11. Diode clippers12. Transistor clippers13. Clipping at two independent levels14. Transfer characteristics of clippers15. Emitter coupled clipper16. Comparators, applications of voltage comparators,

17.Clamping operation, clamping circuits using diode with different

inputs18. Clamping circuit theorem19. Practical clamping circuits20. Effect of diode characteristics on clamping voltage21. Transfer characteristics of clampers22. Review & Problems

UNIT 3 SWITCHING CHARACTERISTICS OF DEVICES: 23. Diode as a switch24. Piecewise linear diode characteristics25. Transistor as a switch26. Break down voltage consideration of transistor

27.Saturation parameters of Transistor and their variation with

temperature28. Design of transistor switch

29. Transistor-switching times30. Review & Problems

UNIT 4 MULTIVIBRATORS :31. Analysis and Design of Bistable32. do33. Analysis and Design of Monostable34. do35. Analysis and Design of Astable Multivibrators36. do37. Schmitt trigger using transistors38. Review & Problems

UNIT 5 TIME BASE GENERATORS: 39. General features of a time base signal40. Methods of generating time base waveform41. Miller and Bootstrap time base generators – basic principles42. Transistor miller time base generator43. Transistor Bootstrap time base generator44. Current time base generators45. Review & Problems

UNIT 6 SYNCHRONIZATION AND FREQUENCY DIVISION: 46. Principles of Synchronization47. Frequency division in sweep circuit48. Astable relaxation circuits49. Monostable relaxation circuits50. Synchronization of a sweep circuit with symmetrical signals51. Sine wave frequency division with a sweep circuit52.

UNIT 7 SAMPLING GATES: 53. Basic operating principles of sampling gates54. Unidirectional and Bi-directional sampling gates

55.Reduction of pedestal in gate circuits, Applications of sampling

gates56. Review & Problems

UNIT 8 REALIZATION OF LOGIC GATES USING DIODES & TRANSISTORS:57. AND, OR gates using Diodes58. AND, OR gates using Resistor- Transistor Logic59. AND, OR gates using Diode Transistor Logic60. Review & Problems61.62.

TEXT BOOKS :1. Pulse, Digital and Switching Waveforms - J. Millman and H. Taub, McGraw-Hill, 1991.2. Solid State Pulse circuits - David A. Bell, PHI, 4th Edn., 2002 .

REFERENCES :1. Pulse and Digital Circuits – A. Anand Kumar, PHI, 2005.2. Wave Generation and Shaping - L. Strauss.3. Pulse, Digital Circuits and Computer Fundamentals - R.Venkataraman.