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Friday, July 18, 2008

PIECEWISE LINEAR SOURCE - pspice




The symbol of Piecewise linear source is PWL. And the general form is
PWL (T1 V1 T2 V2 T3 V3 …..TN VN)

A point in a wave form can be described by (Ti, Vi) or (Ti, Ii), and every pair of values (Ti, Vi) or (Ti, Ii), specifies the source value at Time Ti, The voltage at times between the intermediate points is determined by P Spice by using linear interpolation.

MODEL PARAMETERS OF PWL SOURCES
Name Meaning Units Default
Ti Time at a Point Seconds None
Vi Voltage at a Point Volts None
Typical Statements for the above wave form
T0 = 0
V0 = 0
T1 = 5
V1 = 3
T2 = 10us
V2 = 3V
T3 = 15us
V3 = 6V
T4 = 40us
V4 = 6V
T5 = 45us
V5 = 2V
T6 = 60us
V6 = 2V
T7 = 65us
V7 = 0
PWL (0 0 5 3 10US 3V 15US 6V 40US 6V 45US 2V 60US 2V 65US 0)

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