summaryrefslogtreecommitdiffstats
path: root/src/electronics/simulation/vcvs.cpp
blob: 68604df229a29faffc563d39b7724232bead9b9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
/***************************************************************************
 *   Copyright (C) 2003-2004 by David Saxton                               *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program 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.                                   *
 ***************************************************************************/

#include "elementset.h"
#include "matrix.h"
#include "vcvs.h"

VCVS::VCVS( const double gain )
	: Element::Element()
{
	m_g = gain;
	m_numCBranches = 1;
	m_numCNodes = 4;
}


VCVS::~VCVS()
{
}


void VCVS::setGain( const double g )
{
	if ( g == m_g )
		return;
	
	if (p_eSet)
		p_eSet->setCacheInvalidated();
	
	m_g = -m_g;
	add_initial_dc();

	m_g = g;
	add_initial_dc();
}


void VCVS::add_map()
{
	if (!b_status)
		return;
	
	if ( !p_cnode[0]->isGround )
	{
		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_stable, false );
	}
	if ( !p_cnode[1]->isGround  )
	{
		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[1]->n(), Map::et_stable, false );
	}
	if ( !p_cnode[2]->isGround  )
	{
		p_A->setUse_b( p_cnode[2]->n(), p_cbranch[0]->n(), Map::et_constant, true );
		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[2]->n(), Map::et_constant, true );
	}
	if ( !p_cnode[3]->isGround  )
	{
		p_A->setUse_b( p_cnode[3]->n(), p_cbranch[0]->n(), Map::et_constant, true );
		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[3]->n(), Map::et_constant, true );
	}
}


void VCVS::add_initial_dc()
{
	if (!b_status)
		return;
	
	A_c( 0, 0 ) -= m_g;
	A_c( 0, 1 ) += m_g;
	A_b( 2, 0 ) = 1;
	A_c( 0, 2 ) = 1;
	A_b( 3, 0 ) = -1;
	A_c( 0, 3 ) = -1;
}


void VCVS::updateCurrents()
{
	if (!b_status) return;
	m_cnodeI[0] = m_cnodeI[1] = 0.;
	m_cnodeI[3] = p_cbranch[0]->i;
	m_cnodeI[2] = -m_cnodeI[3];
}