IEEE Spice Seminar

1
IEEE Spice Seminar
Simulation Program with Integrated Circuit
Emphasis
2
Examples of Types of Spice Simulations

• Bias Point
• DC Sweep
• Transient Analysis
• AC sweep/Noise
• Secondary (nested) sweeps
• Parametric
• Temperature
• Monte Carlo

3
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)
4
Bias Point and DC sweep
Bias Point Results
Single Operating point
DC Sweep Results
Output as a function of Vin
Vo
Vin
5
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
6
Key Difference Between AC Sweep and the others
(Transient Analysis, DC Sweep and Bias Point
Analysis)
Transient
Output saturates at /-10V
t
Ao100
AC Sweep
Output Does NOT saturate! Vout Ao Vin Vin 1
gt Vout Ao
Vo(s) Ao(s)
100
Ao100
freq
1K Hz