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

Voltage-Controlled Switch, SPDT

 

Netlist Format

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

Exxx ( n1 n2 n3 n4 n5 ) VSPDT [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 around the list of node names are required. The entry VSPDT identifies the element as a voltage-controlled SPDT switch.

 


Voltage-Controlled Switch, SPDT Instance Parameters

Parameter

Description

Units

Default

ROFF

Off resistance

Ohm

1e6

RON

On resistance

Ohm

1.0

VOFF

Control voltage for off state

Volt

0.0

VON

Control voltage for on state

Volt

1.0

AREA

Area scaling factor

None

1.0


Netlist Example

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

R1 c1 0 1

Vn1 n1 0 10

Rn2 n2 0 10

Rn3 n3 0 10

 

E1 (n1 n2 n3 c1 0) vspdt von=1

Notes

1. In normal operation, VON is greater than VOFF. Output node n2 is selected whencontrol voltage VC is less than or equal to VOFF, and output node n3 is selected when VC is greater than or equal to VON.

2. In inverted operation, VOFF is greater than VON. Output node n2 is selected when VC is greater than or equal to VOFF, and output node n3 is selected when VC is less than or equal to VON.

VSPDT Model Equations

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

If ((VON >=VOFF && VC >= VON) || (VON < VOFF && VC <= VON)):

 

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Else if ((VON >= VOFF && VC <= VOFF) || (VON < VOFF && VC >= VOFF)):

 

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Else:

 

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Where:

 

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