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Add a new code model 'sidiode' with a simple diode:
Add a new code model 'sidiode' with a simple diode:
Linear reverse, off, and on regions Smooth parabolic transition between the regions Maximum current settings possible with tanh transistion Current versus voltage continuously differentiable No diode capacitancepre-master-46
Holger Vogt
8 years ago
4 changed files with 353 additions and 0 deletions
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1src/xspice/icm/xtradev/modpath.lst
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240src/xspice/icm/xtradev/sidiode/cfunc.mod
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108src/xspice/icm/xtradev/sidiode/ifspec.ifs
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4visualc/xspice/xtradev.vcxproj
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/*.......1.........2.........3.........4.........5.........6.........7.........8 |
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================================================================================ |
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FILE diodes/cfunc.mod |
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Copyright 2018 |
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GHolger Vogt |
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All Rights Reserved |
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AUTHORS |
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2 October 2018 Holger Vogt |
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MODIFICATIONS |
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SUMMARY |
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This file contains the model-specific routines used to |
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functionally describe a simplified diode code model. |
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INTERFACES |
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FILE ROUTINE CALLED |
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REFERENCED FILES |
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Inputs from and outputs to ARGS structure. |
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NON-STANDARD FEATURES |
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NONE |
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===============================================================================*/ |
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/*=== INCLUDE FILES ====================*/ |
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#include <stdlib.h> |
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#include <math.h> |
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/*=== CONSTANTS ========================*/ |
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/*=== MACROS ===========================*/ |
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/*=== LOCAL VARIABLES & TYPEDEFS =======*/ |
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typedef struct { |
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double a1; /* parameter of first quadratic equation */ |
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double a2; /* parameter of first tanh equation */ |
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double b1; /* parameter of second quadratic equation */ |
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double b2; /* parameter of second tanh equation */ |
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double hRevepsilon; /* half delta between Va and Vb */ |
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double hEpsilon; /* half delta between Vc and Vd */ |
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double Va; /* voltage limits of the quadratic regions */ |
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double Vb; |
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double Vc; |
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double Vd; |
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double grev; /* conductance in all three regions */ |
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double goff; |
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double gon; |
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Boolean_t Ili; /* TRUE, if current limits are given */ |
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Boolean_t Revili; |
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Boolean_t epsi; /* TRUE, if quadratic overlap */ |
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Boolean_t revepsi; |
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} Local_Data_t; |
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/*=== FUNCTION PROTOTYPE DEFINITIONS ===*/ |
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/*============================================================================== |
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FUNCTION void cm_diodes() |
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==============================================================================*/ |
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static void |
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cm_sidiode_callback(ARGS, Mif_Callback_Reason_t reason) |
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{ |
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switch (reason) { |
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case MIF_CB_DESTROY: { |
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Local_Data_t *loc = STATIC_VAR (locdata); |
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free(loc); |
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break; |
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} |
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} |
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} |
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/*=== CM_DIODES ROUTINE ===*/ |
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void cm_sidiode(ARGS) /* structure holding parms, |
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inputs, outputs, etc. */ |
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{ |
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Local_Data_t *loc; /* Pointer to local static data, not to be included |
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in the state vector */ |
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Mif_Complex_t ac_gain; /* AC gain */ |
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double Vrev, Vfwd, Vin, Id, deriv, Ilimit, Revilimit; |
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Vrev = -PARAM(vrev); |
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Vfwd = PARAM(vfwd); |
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Ilimit = PARAM(ilimit); |
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Revilimit = -PARAM(revilimit); |
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if (INIT==1) { /* First pass...allocate memory and calculate some constants... */ |
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double grev, goff, gon, Va, Vb, Vc, Vd, hEpsilon, hRevepsilon; |
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CALLBACK = cm_sidiode_callback; |
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/* allocate static storage for *loc */ |
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STATIC_VAR(locdata) = calloc (1, sizeof(Local_Data_t)); |
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loc = STATIC_VAR(locdata); |
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goff = 1./PARAM(roff); |
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gon = 1./PARAM(ron); |
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if (PARAM(rrev) == 0.) |
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grev = gon; |
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else |
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grev = 1./PARAM(rrev); |
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hRevepsilon = 0.5 * PARAM(revepsilon); |
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loc->Va = Va = Vrev - hRevepsilon; |
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loc->Vb = Vb = Vrev + hRevepsilon; |
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if(hRevepsilon > 0.0) { |
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loc->a1 = (goff - grev)/PARAM(revepsilon); |
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loc->a2 = grev/Revilimit; |
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loc->revepsi = MIF_TRUE; |
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} |
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else |
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loc->revepsi = MIF_FALSE; |
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hEpsilon = 0.5 * PARAM(epsilon); |
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loc->Vc = Vc = Vfwd - hEpsilon; |
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loc->Vd = Vd = Vfwd + hEpsilon; |
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if(hEpsilon > 0.0) { |
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loc->b1 = (gon - goff)/PARAM(epsilon); |
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loc->b2 = gon/Ilimit; |
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loc->epsi = MIF_TRUE; |
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} |
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else |
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loc->epsi = MIF_FALSE; |
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if (Ilimit < 1e29) |
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loc->Ili = MIF_TRUE; |
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else |
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loc->Ili = MIF_FALSE; |
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if (Revilimit > -1e29) |
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loc->Revili = MIF_TRUE; |
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else |
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loc->Revili = MIF_FALSE; |
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loc->grev = grev; |
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loc->goff = goff; |
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loc->gon = gon; |
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} |
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else |
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loc = STATIC_VAR(locdata); |
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/* Calculate diode current Id and its derivative deriv=dId/dVin */ |
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Vin = INPUT(ds); |
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if (Vin < loc->Va) { |
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if(loc->Revili) { |
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double tmp = tanh(loc->a2 * (loc->Va - Vin)); |
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Id = Ilimit * tmp + loc->goff * loc->Va |
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+ 0.5 * (loc->Va - loc->Vb) * (loc->Va - loc->Vb) * loc->a1; |
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deriv = loc->grev * (1. - tmp * tmp); |
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} |
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else { |
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Id = Vrev * loc->goff + (Vin - Vrev) * loc->grev; |
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deriv = loc->grev; |
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} |
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} |
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else if (loc->revepsi && Vin >= loc->Va && Vin < loc->Vb) { |
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Id = 0.5 * (Vin -loc->Vb) * (Vin - loc->Vb) * loc->a1 + Vin * loc->goff; |
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deriv = (Vin - loc->Vb) * loc->a1 + loc->goff; |
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} |
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else if (Vin >= loc->Vb && Vin < loc->Vc) { |
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Id = Vin * loc->goff; |
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deriv = loc->goff; |
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} |
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else if (loc->epsi && Vin >= loc->Vc && Vin < loc->Vd) { |
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Id = 0.5 * (Vin -loc->Vc) * (Vin - loc->Vc) * loc->b1 + Vin * loc->goff; |
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deriv = (Vin - loc->Vc) * loc->b1 + loc->goff; |
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} |
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else { |
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if(loc->Ili) { |
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double tmp = tanh(loc->b2 * (Vin - loc->Vd)); |
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Id = Ilimit * tmp + loc->goff * loc->Vd |
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+ 0.5 * (loc->Vd - loc->Vc) * (loc->Vd - loc->Vc) * loc->b1; |
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deriv = loc->gon * (1. - tmp * tmp); |
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} |
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else { |
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Id = Vfwd * loc->goff + (Vin - Vfwd) * loc->gon; |
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deriv = loc->gon; |
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} |
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} |
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if(ANALYSIS != MIF_AC) { /* Output DC & Transient Values */ |
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OUTPUT(ds) = Id; |
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PARTIAL(ds,ds) = deriv; |
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} |
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else { /* Output AC Gain */ |
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ac_gain.real = deriv; |
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ac_gain.imag= 0.0; |
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AC_GAIN(ds,ds) = ac_gain; |
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} |
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} |
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/*.......1.........2.........3.........4.........5.........6.........7.........8 |
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================================================================================ |
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Copyright 2018 |
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Holger Vogt |
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All Rights Reserved |
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AUTHORS |
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2 October 2018 Holger Vogt |
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SUMMARY |
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This file contains the interface specification file for the |
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analog simple diode code model. |
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===============================================================================*/ |
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NAME_TABLE: |
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C_Function_Name: cm_sidiode |
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Spice_Model_Name: sidiode |
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Description: "simple diode" |
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PORT_TABLE: |
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Port_Name: ds |
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Description: "diode port" |
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Direction: inout |
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Default_Type: gd |
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Allowed_Types: [gd] |
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Vector: no |
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Vector_Bounds: - |
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Null_Allowed: no |
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PARAMETER_TABLE: |
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Parameter_Name: ron roff |
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Description: "resistance on-state" "resistance off-state" |
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Data_Type: real real |
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Default_Value: 1 1 |
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Limits: [1e-6 - ] [1e-12 -] |
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Vector: no no |
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Vector_Bounds: - - |
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Null_Allowed: no no |
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PARAMETER_TABLE: |
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Parameter_Name: vfwd vrev |
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Description: "forward voltage" "reverse breakdown voltage" |
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Data_Type: real real |
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Default_Value: 0. 1e30 |
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Limits: [0. -] [0. -] |
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Vector: no no |
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Vector_Bounds: - - |
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Null_Allowed: yes yes |
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PARAMETER_TABLE: |
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Parameter_Name: ilimit revilimit |
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Description: "limit of on-current" "limit of breakdown current" |
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Data_Type: real real |
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Default_Value: 1e30 1e30 |
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Limits: [1e-15 -] [1e-15 -] |
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Vector: no no |
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Vector_Bounds: - - |
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Null_Allowed: yes yes |
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PARAMETER_TABLE: |
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Parameter_Name: epsilon revepsilon |
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Description: "width quadrat. r 1" "width quadratic region 2" |
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Data_Type: real real |
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Default_Value: 0. 0. |
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Limits: [0. -] [0. -] |
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Vector: no no |
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Vector_Bounds: - - |
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Null_Allowed: yes yes |
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PARAMETER_TABLE: |
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Parameter_Name: rrev |
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Description: "resistance in breakdown" |
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Data_Type: real |
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Default_Value: 0. |
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Limits: - |
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Vector: no |
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Vector_Bounds: - |
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Null_Allowed: yes |
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STATIC_VAR_TABLE: |
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Static_Var_Name: locdata |
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Data_Type: pointer |
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Description: "table with constants" |
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