Spice Seminar Simulation Program with Integrated Circuit Emphasis.

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Spice Seminar Simulation Program with Integrated Circuit Emphasis.

Presentation transcript:

Spice Seminar Simulation Program with Integrated Circuit Emphasis

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

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!

Which is more readable/maintanable?

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

DC sweep Result Output as a function of Vin Vo V1

Parametric Sweep – creating a variable

Nested Sweep

Characterizing a MOSFET - specifying a Model file 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

Bias Point Simulation

Transient and AC Sweep Transient Results t t AC Sweep Results Vo freq 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

Transient Sweep Vsin

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