-------------------------------------------------------------------------------
-- Copyright (c) 2003 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 
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-- THIS MODEL IS LICENSED TO YOU "AS IS" AND WITH NO WARRANTIES, EXPRESS OR 
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-------------------------------------------------------------------------------
-- File       : qsrc_Constant.vhd
-- Author     : Mentor Graphics
-- Created    : 2001/06/16
-- Last update: 2003-05-20
-------------------------------------------------------------------------------
-- Description:  Constant Source with real quantity connections.
-- Includes s-domain architecture and Frequency Domain settings
-------------------------------------------------------------------------------
-- Revisions  :
-- Date        Version     Author              Description
-- 2001/06/16  1.0         Mentor Graphics     Created
-- 2001/07/09  1.1         Mentor Graphics     Changed input parameters to type
--                                             time.  Uses time2real function.
--                                             Pulsewidth no longer includes
--                                             rise and fall times.
-------------------------------------------------------------------------------

library IEEE; use IEEE.MATH_REAL.all;
entity qsrc_Constant is
  generic (
           value    : real := 0.0;   -- initial value [nu]
           ac_mag   : real := 1.0;   -- AC magnitude [nu]
           ac_phase : real := 0.0);  -- AC phase [Degrees]
  port (
    quantity output : out real);
end entity qsrc_Constant;

-------------------------------------------------------------------------------
-- Ideal Architecture
-------------------------------------------------------------------------------
architecture ideal of qsrc_Constant is
  -- 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
    output == value;
  else
    output   == ac_spec;    -- used for Frequency (AC) analysis
  end use;
end architecture ideal;

-------------------------------------------------------------------------------
-- Copyright (c) 2003 Mentor Graphics Corporation
-------------------------------------------------------------------------------