Macromodel Generator
Free running frequency when Vin is zero:
Voltage-to-frequency conversion gain [Radians/sec/volt]:
Timming resistor [Ohms] :
Timming capacitor [Farads] :
Peak-to-peak voltage of triangle wave :
Peak-to-peak voltage of sine wave :
Amplitude of square wave :
Peak amplitude of square wave :
DC level of triangle and sine waves [Volts] :
Input resistance [Ohms] :
Output resistance[Ohms] :
Subcircuit Name :
This macromodel is used for :
a) Step of frequency source.
b) Ramp of frequency source.
c) Voltage controlled oscillator.
d) Sawtooth oscillator macromodel.
e) Rectangular wave generator.
Frequency accuracy depends on the value of C1. If C1 is larger than 1E-15F, the accuracy decreases but computational efficiency increases.
For initial conditions, use .IC V(105)=0.0 V(107)=-10
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REFERENCES :
J.Alvin Connelly and P. Choi, Macromodeling with Spice, Prentice Hall, 1992 ISBN 0-13-544941-3
Copyright © 1995 F. Barbosa
Last updated 1996 Oct 12