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-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs 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.
-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
library ieee; use ieee.math_real.all;
library ieee_proposed; use ieee_proposed.electrical_systems.all;
entity v_source is
generic ( DC : voltage := 1.0; -- output peak amplitude
min_freq : real := 10.0; -- minimum frequency for spectral source
max_freq : real := 1.0e4; -- maximum frequency for spectral source
ac_mag : voltage := 1.0; -- AC magnitude
ac_phase : real := 0.0 ); -- AC phase [degree]
port ( terminal pos, neg : electrical );
end entity v_source;
----------------------------------------------------------------
architecture behavior of v_source is
function g (freq : real) return real is
begin
if (freq > min_freq and freq < max_freq) then
return 1.0;
else
return 0.0;
end if;
end function g;
quantity vout across iout through pos to neg;
-- declare quantity in frequency domain for AC analysis
quantity ac_spec : real spectrum ac_mag*g(frequency),
math_2_pi*ac_phase/360.0;
begin
if domain = quiescent_domain or domain = time_domain use
vout == DC;
else
vout == ac_spec; -- used for frequency (AC) analysis
end use;
end architecture behavior;
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