Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / ocs-0.1.3 / sbn / Mpdesympnjunct.m

diff --git a/octave_packages/ocs-0.1.3/sbn/Mpdesympnjunct.m b/octave_packages/ocs-0.1.3/sbn/Mpdesympnjunct.m
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+## Copyright (C) 2006,2007,2008  Carlo de Falco            
+##
+## This file is part of:
+## OCS - A Circuit Simulator for Octave
+##
+## OCS is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program (see the file LICENSE); if not,
+## see <http://www.gnu.org/licenses/>.
+##
+## author: Carlo de Falco <cdf _AT_ users.sourceforge.net> 
+
+## -*- texinfo -*-
+##
+## @deftypefn{Function File} @
+## {[@var{j},@var{g}]=}Mpdesympnjunct@
+## (@var{len}, @var{Dope}, @var{va}, @
+## @var{Area}, @var{Nnodes}, @var{toll}, @var{maxit}, @var{ptoll}, @var{pmaxit})
+##
+## INTERNAL FUNCTION:
+##
+## NOT SUPPOSED TO BE CALLED DIRECTLY BY USERS
+## @end deftypefn
+
+function [j,g] = Mpdesympnjunct (len,Dope,va,Area,Nnodes,toll,maxit,ptoll,pmaxit)
+  
+  constants
+
+  x = linspace(0,len,Nnodes)';
+  xm = mean(x);
+  Nd=Dope;
+  Na=Dope;
+  nn = (Nd + sqrt(Nd^2+4*ni^2))/2;
+  pp = (Na + sqrt(Na^2+4*ni^2))/2;
+  xn = xm+len/10;
+  xp = xm-len/10;
+  D = Nd * (x>xm) - Na * (x<=xm);
+
+  ## Scaling coefficients
+  xs        = len;
+  ns        = norm(D,inf);
+  Vs        = Vth;
+  us        = un;
+  Js        = (Area*us*Vs*q*ns/xs);
+  xin       = x/xs;
+  gs        = Js/Vs;
+  
+  n = nn * (x>=xn) + (ni^2)/pp * (x<xn);
+  p = (ni^2)/nn * (x>xp) + pp * (x<=xp);
+  
+  Fn = va*(x<=xm);
+  Fp = Fn;
+  
+  V  = (Fn - Vth * log(p/ni)); 
+  
+  ## Scaling
+  idata.D    = D/ns;
+  idata.un   = un/us;
+  idata.up   = up/us;
+  idata.tn   = inf;
+  idata.tp   = inf;
+  idata.l2   = (Vs*esi)/(q*ns*xs^2);
+  idata.nis  = ni/ns;
+  idata.n   = n/ns;
+  idata.p   = p/ns;
+  idata.V   = V/Vs;
+  idata.Fn  = (Fn - Vs * log(ni/ns))/Vs;
+  idata.Fp  = (Fp + Vs * log(ni/ns))/Vs;
+  
+
+  ## Solution of DD system    
+  ## Algorithm parameters
+ 
+  sinodes = [1:length(x)];
+  
+  [idata,it,res] = DDGgummelmap (xin,idata,toll,maxit/2,ptoll,pmaxit,0);
+  [odata,it,res] = DDNnewtonmap (xin,idata,toll,maxit/2,0);
+  
+  DV = diff(odata.V);
+  h  = xin(2)-xin(1);
+  
+  Bp = Ubernoulli(DV,1);
+  Bm = Ubernoulli(DV,0);
+  
+  Jn = -odata.un * (odata.n(2:end).*Bp-odata.n(1:end-1).*Bm)/h;
+  Jp =  odata.up * (odata.p(2:end).*Bm-odata.p(1:end-1).*Bp)/h;
+    
+  coeff = idata.un.*Umediaarmonica(odata.n);
+  L =- Ucomplap (xin,Nnodes,[],[],coeff);
+  Jn1 = L*odata.Fn;
+  fprintf(1,"jn1=%g\n",Jn1(1))
+  fprintf(1,"jn=%g\n",Jn(1))
+  
+  C11 = L(1,1);
+  C1I = L(1,2:end-1);
+  CII = L(2:end-1,2:end-1);
+  Gn   = C11 - C1I*(CII\C1I');
+  Gn   = Gn - coeff(1)*(odata.Fn(2)-odata.Fn(1))/h
+
+  coeff = idata.up.*Umediaarmonica(odata.p);
+  L =- Ucomplap (xin,Nnodes,[],[],coeff);
+  Jp1 = L*odata.Fp;
+  fprintf(1,"jp1=%g\n",Jp1(1))
+  fprintf(1,"jp=%g\n",Jp(1))
+  
+  C11 = L(1,1);
+  C1I = L(1,2:end-1);
+  CII = L(2:end-1,2:end-1);
+  Gp   = C11 - C1I*(CII\C1I');
+  Gp   = Gp - coeff(1)*(odata.Fp(2)-odata.Fp(1))/h
+
+
+  ## Descaling
+  j= -(Jp(1)+Jn(1))*Js
+  g= gs*(Gn+Gp)
+
+endfunction
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