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Spice Seminar

Spice Seminar. S imulation P rogram with I ntegrated C ircuit E mphasis. Generating a Netlist. SPICE Netlist Text file used for simulation. Simulate. Generate Netlist (SPICE Netlist Different flavors Quite similar). Schematic Entry (Common Data format: EDIF). Netlist Format.

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Spice Seminar

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  1. Spice Seminar Simulation Program with Integrated Circuit Emphasis

  2. Generating a Netlist SPICE Netlist Text file used for simulation Simulate Generate Netlist (SPICE Netlist Different flavors Quite similar) Schematic Entry (Common Data format: EDIF)

  3. Netlist Format C B E model name Q1 Vo Vin 0 Q2N2222 R1 Vo Vcc 1K V1 Vin 0 V2 Vcc 0

  4. Number format m 10-3 u 10-6 n 10-9 p 10-12 f 10-15 K 103 Meg 106 G 109 Alternative Notation 1e3 Note 10M is the same as 10m!

  5. Which is more readable/maintanable?

  6. Examples of Types of Spice Simulations • Bias Point • DC Sweep • Transient Analysis • AC sweep/Noise • Secondary (nested) sweeps • Parametric • Temperature • Monte Carlo

  7. DC sweep Result Output as a function of Vin Vo V1

  8. Parametric Sweep – creating a variable

  9. Nested Sweep

  10. Characterizing a MOSFET - specifying a Model file Primary Sweep and secondary sweep Vd secondary Vg primary D G S B M1 Vd Vg 0 0 MbreakN V1 Vg 0 V2 Vd 0 .model MBreakN NMOS Vto = 1V Kp = 2m

  11. Bias Point Simulation

  12. Transient and AC Sweep Transient Results Time varying inputs (ex. Sinusoidal, digital clock) Output as a function of time t t AC Sweep Results Vo Multiple sinusoidal inputs each with a different frequency Output as a function of freq. freq

  13. Transient Sweep Vsin

  14. Examples of Types of Spice Simulations • Bias Point • DC Sweep • Transient Analysis • AC sweep/Noise • Secondary (nested) sweeps • Parametric • Temperature • Monte Carlo

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