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Nexxim Simulator >
Nexxim Component Models >
Switches >
   Current-Controlled Switch, SPDT       

Current-Controlled Switch, SPDT

 

Netlist Format

An instance of a current-controlled single-pole, double throw switch has the netlist syntax:

Gxxx ( n1 n2 n3 ) ISPDT PROBE=name [ROFF=val] [RON=val] [IOFF=val] [ION=val] [AREA=val]

n1 is the input node, n2 is the “OFF” output node, n3 is the “ON” output node, n4 and n5 are the control nodes. The parentheses are required around the list of node names. The entry ISPDT identifies the element as a current-controlled SPDT switch.

 


Current-Controlled Switch, SPDT Instance Parameters

Parameter

Description

Units

Default

ROFF

Off resistance

Ohm

1e6

RON

On resistance

Ohm

1.0

IOFF

Control current for off state

Ampere

0.0

ION

Control current for on state

Ampere

1.0

AREA

Area scaling factor

None

1.0

PROBE

Name of the controlling current probe or voltage source

None

None


 

Netlist Example

v1 c1 0 SIN(0 10 1e6) // Control source

R1 c1 0 1

Vn1 n1 0 10

Rn2 n2 0 10

Rn3 n3 0 10

G1 (n1 n2 n3) ispdt probe=v1

Notes

1. In normal operation, ION is greater than IOFF. Output node n2 is selected whencontrol current IC is less than or equal to IOFF, and output node n3 is selected when IC is greater than or equal to ION.

2. In inverted operation, IOFF is greater than ION. Output node n2 is selected when IC is greater than or equal to IOFF, and output node n3 is selected when IC is less than or equal to ION.

ISPDT Model Equations

G1 is the conductance betrween node 1 and node 2. G2 is the conductance between node 1 and node 3.

If ((ION > IOFF && IC >= ION) || (ION < IOFF && IC <= ION)):

 

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Else if ((ION > IOFF && IC <= IOFF) || (ION < IOFF && IC >= IOFF)):

 

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Else:

 

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Where:

 

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