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-- 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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-- IN THIS LICENSE AGREEMENT.  Mentor Graphics grants you a non-exclusive 
-- license to use, reproduce, modify and distribute this model, provided that:
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-- notice that this model has been modified and the date of modification; and 
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--
-- THIS MODEL IS LICENSED TO YOU "AS IS" AND WITH NO WARRANTIES, EXPRESS OR 
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-- File       : r_dynthermal.vhd
-- Author     : Mentor Graphics
-- Created    : 2001/06/16
-- Last update: 2001/06/16
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-- Description: Electrical Resistance Model with Dynamic Thermal
--              Characteristics
--              Valid only for temp > temp_cold + 273.18
-------------------------------------------------------------------------------
-- Revisions  :
-- Date        Version     Author              Description
-- 2001/06/16  1.0         Mentor Graphics     Created    
-------------------------------------------------------------------------------

-- Use proposed IEEE natures and packages
library IEEE;
use IEEE.THERMAL_SYSTEMS.all;
use IEEE.ELECTRICAL_SYSTEMS.all;

entity r_dynthermal is

  generic (
    r_cold    : resistance;             -- Electrical resistance at temp_cold
    temp_cold : real 	:= 27.0;    -- Calibration temperature (deg C)
    alpha     : real    := 0.0);    -- Linear temperature coefficient 

  port (
    terminal p1, p2 : electrical;
    terminal th1    : thermal);

end entity r_dynthermal;

-------------------------------------------------------------------------------
-- Linear Architecture
-- resistance = r_cold*[1.0 + alpha*(temp - (temp_cold+273.18))]
-------------------------------------------------------------------------------
architecture linear of r_dynthermal is

  quantity v across i through p1 to p2;
  quantity r_temp : resistance;
  quantity temp across hflow through th1 to thermal_ref;

begin

  r_temp == r_cold*(1.0 + alpha*(temp - (temp_cold + 273.18)));
  v      == i*r_temp;
  hflow  == -1.0*v*i;

end architecture linear;

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-- Copyright (c) 2001 Mentor Graphics Corporation
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