I have tried to simulate a memristor model which already working well on LTspice.
but gives a syntax error in qspice. can anyone help debug?
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Knowm Mean Metastable Switch Memristor SPICE Model
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Copyright Tim Molter Knowm Inc. 2017
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Connections:
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TE: Top electrode
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BE: Bottom electrode
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XSV: External connection to plot state variable
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that is not used otherwise
.SUBCKT MEM_KNOWM TE BE XSV
- Ron: Minimum device resistance
- Roff: Maximum device resistance
- Von: Threshold voltage to turn device on
- Voff: Threshold voltage to turn device off
- TAU: Time constant
- T: Temperature
.params Ron=500 Roff=1500 Voff=0.27 Von=0.27 TAU=0.0001 T=298.5 x0=0
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Function G(V(t)) - Describes the device threshold
.func G(V) = V/Ron+(1-V)/Roff -
Function F(V(t),x(t)) - Describes the SV motion
.func F(V1,V2) = (1/TAU)((1/(1+exp(-1/(Tboltz/echarge)(V1-Von))))(1-V2)-(1-(1/(1+exp(-1/(Tboltz/echarge)(V1+Voff)))))*V2 -
Memristor I-V Relationship
.func IVRel(V1,V2) = V1*G(V2) -
Circuit to determine state variable
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dx/dt = F(V(t),x(t))*G(V(t))
Cx XSV 0 {1}
.ic V(XSV) = x0
Gx 0 XSV value={F(V(TE,BE),V(XSV,0))} -
Current source for memristor IV response
Gmem TE BE value={IVRel(V(TE,BE),V(XSV,0))}
.ENDS MEM_KNOWM
