Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / secs2d-0.0.8 / Utilities / Ufielddepmob.m

diff --git a/octave_packages/secs2d-0.0.8/Utilities/Ufielddepmob.m b/octave_packages/secs2d-0.0.8/Utilities/Ufielddepmob.m
new file mode 100644 (file)
index 0000000..3c5af8b
--- /dev/null
+++ b/octave_packages/secs2d-0.0.8/Utilities/Ufielddepmob.m
@@ -0,0 +1,43 @@
+function mob = Ufielddepmob(imesh,u0,F,vsat,b)
+
+
+% mob = Ufielddepmob(imesh,u0,F,vsat,b) 
+% Computes field dependent mobility
+
+% This file is part of 
+%
+%            SECS2D - A 2-D Drift--Diffusion Semiconductor Device Simulator
+%         -------------------------------------------------------------------
+%            Copyright (C) 2004-2006  Carlo de Falco
+%
+%
+%
+%  SECS2D 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; either version 2 of the License, or
+%  (at your option) any later version.
+%
+%  SECS2D 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 SECS2D; If not, see <http://www.gnu.org/licenses/>.
+
+
+
+[Ex,Ey]=Updegrad(imesh,F);
+
+
+ef = sqrt(Ex.^2+Ey.^2);
+
+if Ucolumns(ef)>Urows(ef)
+    ef=ef';
+end
+if Ucolumns(u0)>Urows(u0)
+    u0=u0';
+end
+
+mob = u0 ./ (1+(u0 .* ef ./ vsat).^b).^(1/b);
+