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Highlights from
EC-SIM 1.1

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from EC-SIM 1.1 by Rasmus Anthin
Design circuits, simulate (steady-state and sweep) and define your own models.

[tnet,term,param,def,symb]=mod_npnsmall_pi(net)
function [tnet,term,param,def,symb]=mod_npnsmall_pi(net)
%
% p1 : beta
% p2 : Rpi
% p3 : Ro
%
% n1 : B
% n2 : C
% n3 : E
%
%        2
% 1  |_/
%  --|
%    |>
%      \ 3
%
%   1                               2
%     o--+               +-----+--o
%        |               |     |
%        |     iB*beta  / \    |
%        #             / | \   #
%        # Rpi         \ v /   # Ro
%        #              \ /    #
%        |               |     |
%        +--->-----+-----+-----+
%        4  iB     |
%                  |
%                  o  3
%

% t n1 n2 n3 n4 n5 id p1 p2 p3 p4 p5 p6 p7 p8 p9

if ~nargin, net=nan*ones(1,24);end
def=[100 1e3 inf];
if isnan(net(8)), net(8)=def(1);end
if isnan(net(9)), net(9)=def(2);end
if isnan(net(10)), net(10)=def(3);end
beta=net(8);
Rpi=net(9);
Ro=net(10);

tnet=nan*ones(3,24);
tnet(1,1:6)=[ 6 4 3 2 3 beta];
tnet(2,1:4)=[ 7 1 4 Rpi];
tnet(3,1:4)=[ 7 2 3 Ro];

term={'B','C','E'};
param={'beta','Rpi','Ro'};
c=1/2;
symb.patch{1}=c*(-[.3 .2 .2 .3]+j*[.75 .75 -.75 -.75]);  %base plate
symb.patch{2}=c*(([5/4 3/4 3/4]+j*[0 1/5 -1/5])*exp(j*atan2(-3/4,1))-(.25+.25j));
symb.patchcol={[0 0 0],[0 0 0]};
symb.line{1}=c*(-[1 .25]+j*[0 0]);      %base terminal
symb.line{2}=c*([-.25 .75 1]+j*[.25 1 1]);    %collector terminal
symb.line{3}=c*([-.25 .75 1]-j*[.25 1 1]);    %emitter terminal
symb.line{4}=c*1.25*(cos(2*pi*linspace(0,1))+j*sin(2*pi*linspace(0,1)));
symb.linecol={[0 0 0],[0 0 0],[0 0 0],[0 0 0]};
symb.label='Q';
symb.enum=17;
symb.term=c*([-1+0j 1+j 1-j]);        %B, C, E
symb.rotax=[1 1 2 3];
symb.dx=1;
symb.ang=-90;
symb.ortho=1;

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