RF Power Amplifier, 2nd Edition

Appendix B

Introduction to SPICE

SPICE is an abbreviation for Simulation Program for Integrated Circuit Emphasis. PSPICE is the PC version of SPICE. Analog and digital electronic circuit designs are verified widely by both industries and the academia using PSPICE. It is used to predict the circuit behavior.

Passive Components: Resistors, Capacitors, and Inductors

Rname N+ N- Value [IC = TC1]

Lname N+ N- Value [IC = Initial Voltage Condition]

Cname N+ N- Value [IC = Initial Current Condition]

Examples:

R1 1 2 10K

L2 2 32M

C3 3 4 100P

Transformer

Lp Np+ Np- Lpvalue

Ls Ns+ Ns- Lsvalue

Kname Lp Ls Kvalue

Example:

Lp 1 0 1 mH

Ls 2 4 100 uH

Kt Lp Ls 0.999

Temperature

.TEMP list of temperatures

Example:

.TEMP 27 100 150

Independent DC Sources

Vname N+ N- DC Value

Iname N+ N- DC Value

Examples:

Vin 1 0 DC 10

Is 1 0 DC 2

DC Sweep Analysis

.DC Vsource-name Vstart Vstop Vstep

Example:

.DC VD 0 0.75 1m

Independent Pulse Source for Transient Analysis

Vname N+ N- PULSE (VL VH td tr tf PW T)

Example:

VGS 1 0 PULSE(0 10 0 0 0 10E-6 100e-6)

Transient Analysis

.TRAN time-step time-stop

Example:

.TRAN 0.1ms 100ms 0ms 0.2ms

Independent AC Sources for Frequency Response

Vname N+ N- AC Vm Phase

Iname N+ N- AC Im Phase

Example:

Vs 2 3 AC 2 30

Is 2 3 AC 0.5 30

Independent Sinusoidal AC Sources for Transient Analysis

Vname N+ N- SIN (Voffset Vm f T-delay Damping-Factor Phase-delay)

Iname N+ N- SIN (Ioffset Im f T-delay Damping-Factor Phase-delay)

Examples:

Vin 1 0 SIN (0 170 60 0 -120)

Is 1 0 SIN (0 ...