-------------------------------------------------------------------------------
-- Copyright (c) 2001 Mentor Graphics Corporation
--
-- This model is a component of the Mentor Graphics VHDL-AMS educational open 
-- source model library, and is covered by this license agreement. This model,
-- including any updates, modifications, revisions, copies, and documentation 
-- are copyrighted works of Mentor Graphics. USE OF THIS MODEL INDICATES YOUR 
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-- THIS MODEL IS LICENSED TO YOU "AS IS" AND WITH NO WARRANTIES, EXPRESS OR 
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-------------------------------------------------------------------------------
-- File       : i_constant.vhd
-- Author     : Mentor Graphics
-- Created    : 2001/06/16
-- Last update: 2003-05-13
-------------------------------------------------------------------------------
-- Description: Electrical Constant Current Source
--              Includes Frequency Domain Settings
-------------------------------------------------------------------------------
-- Revisions  :
-- Date        Version     Author              Description
-- 2001/06/16  1.0         Mentor Graphics     Created    
-------------------------------------------------------------------------------

library IEEE;
use IEEE.math_real.all;
-- Use IEEE natures and packages
use IEEE.electrical_systems.all;

entity i_constant is

  generic (
    level    : current;                 -- Constant current value [Amps]
    ac_mag   : current := 1.0;          -- AC magnitude [Amps]
    ac_phase : real    := 0.0);         -- AC phase [Degrees]

  port (
    terminal pos, neg : electrical);

end entity i_constant;

-------------------------------------------------------------------------------
-- Ideal Architecture (I = constant)
-------------------------------------------------------------------------------
architecture ideal of i_constant is

-- Declare internal quantities
  quantity v across i through pos to neg;
-- Declare quantity in frequency domain for AC analysis
  quantity ac_spec : real spectrum ac_mag, math_2_pi*ac_phase/360.0;

begin

  if domain = quiescent_domain or domain = time_domain use
    i == level;
  else
    i   == ac_spec;       -- used for Frequency (AC) analysis
  end use;

end architecture ideal;

-------------------------------------------------------------------------------
-- Copyright (c) 2001 Mentor Graphics Corporation
-------------------------------------------------------------------------------