MULTVR - Multiplication of Voltages (Differential Inputs)

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Modified by Admin on Sep 13, 2017

Model Kind

General

Model Sub-Kind

Spice Subcircuit

SPICE Prefix

Model Name

MULTVR

SPICE Netlist Template Format

@DESIGNATOR %1 %2 %3 %4 %5 %6 @MODEL

Parameters (definable at component level)

None

Notes

The content of the sub-circuit file (MULTVR.ckt) associated with this model is shown below. The formula/equation used to provide this function is declared as part of the netlist-specific entry, under the .SUBCKT line of the file.

*Multiply Voltages .SUBCKT MULTVR 1 2 3 4 5 6 BX 5 6 V=V(1,2)*V(3,4) .ENDS MULTVR

Examples

Consider the circuit in the image above, which uses math function components to implement the trigonometric base equation:

Sin2(v) + Cos2(v) = 1

With respect to the MULTVR components, the entries in the SPICE netlist will be:

*Schematic Netlist: XMCos2 COS 0 COS 0 COSSQ 0 MULTVR XMSin2 SIN 0 SIN 0 SINSQ 0 MULTVR . . *Models and Subcircuit: .SUBCKT MULTVR 1 2 3 4 5 6 BX 5 6 V=V(1,2)*V(3,4) .ENDS MULTVR

The effect of the function can be seen in the resultant waveforms obtained by running a transient analysis of the circuit.

In this example, the following analysis parameters on the Transient/Fourier Analysis page of the Analyses Setup dialog have been used:

Transient Start Time - set to 0.000
Transient Stop Time - set to 50.00m
Transient Step Time - set to 200.0u
Transient Max Step Time - set to 200.0u