Search this site

Simulation Exercises for SEQUEL (A Solver for circuit EQuations with User-defined ELements)

Simulation Exercises in  SEQUEL

 SEQUEL (A Solver for circuit EQuations with User-defined ELements) is a general-purpose simulation package developed at IIT Bombay. It has been extensively used for R and D activities at IIT Bombay. Recently, several examples in electronics and power electronics have been added to the package, making it attractive for teaching purposes. 

Features

  • DC, transient, small-signal
  • Efficient "steady-state waveform" computation
  • digital (event-driven) simulation
  • mixed-signal simulation
  • perfectly "general" elements (mechanical, thermal, etc.)
  • GUI for schematic capture, plotting, etc.
  • Allows user-defined elements (linux version only)
  • Free to Download !!

Each of the following documents (pdf files) includes a short introduction to a specfic topic, followed by simulation exercises. A circuit file is provided as a starting point. The name of the circuit file is given at the top of the document for that topic.
  1. Basic network theory: source transformation
  2. Mesh analysis example
  3. Nodal analysis example
  4. Thevenin theorem example
  5. Superposition example
  6. RC circuits: periodic input
  7. RL circuits: transient
  8. Resonance: series RLC circuit
  9. Series RLC circuit: time-domain response
  10. Diode I-V curve
  11. Diode shunt clipper
  12. Diode series clipper
  13. Diode clipping circuit example
  14. Diode clamping circuit example
  15. Voltage doubler
  16. Full-wave rectifier: centre-tapped
  17. Full-wave rectifier: centre-tapped with Zener regulation
  18. Zener regulator
  19. BJT: Ic versus Vce characteristics
  20. Common-emitter amplifier: biasing and frequency response
  21. Common-emitter amplifier: input resistance
  22. Common-emitter amplifier: output resistance
  23. Differential pair (BJT): common-mode and differential-mode gain
  24. BJT inverter: transfer characteristic
  25. Simple BJT mirror
  26. Cascode BJT mirror
  27. Op Amp inverting amplifier: basic operation
  28. Op Amp inverting amplifier: slew rate limitation
  29. Op Amp inverting amplifier: gain-bandwidth product
  30. Op Amp filters: first-order low-pass filter
  31. Bass equalizer
  32. Sinusoidal oscillators: phase-shift oscillator
  33. Op Amp: monostable circuit
  34. Op Amp: triangular wave generator
  35. Voltage regulation with Op Amp
  36. Non-inverting Schmitt trigger
  37. Inverting Schmitt trigger
  38. Synchronous decade counter
  39. Asynchronous counter example
  40. Synchronous counter example
  41. 555 timer: monostable operation
  42. 555 timer: astable operation
  43. Boost converter
  44. Active Boost converter
  45. Boost converter: zero voltage switching
  46. Diode bridge: single-phase
  47. Diode bridge: three-phase
  48. Thyristor bridge: single-phase
  49. Thyristor bridge: three-phase
  50. Buck-Boost converter
  51. Buck converter
  52. Cuk converter
  53. Resonant series converter