-------------------------------------------------------------------------------
-- 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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-------------------------------------------------------------------------------
-- File       : e_Deriv.vhd
-- Author     : Mentor Graphics
-- Created    : 2003/03/26
-- Last update: 2003-05-20
-------------------------------------------------------------------------------
-- Description: Ideal derivative block with electrical connections. 
-------------------------------------------------------------------------------
-- Revisions  :
-- Date        Version     Author              Description
-- 2003/03/26  1.0         Mentor Graphics     Created    
-------------------------------------------------------------------------------

library ieee;
use ieee.math_real.all;
library IEEE;
use IEEE.electrical_systems.all;

entity e_Deriv is
  generic (
    K : real := 1.0);  -- gain
  port (
    terminal input, output : electrical);
end entity e_Deriv;

-------------------------------------------------------------------------------
-- Transfer Fucntion:
--
--             s
-- H(s) = K * ---
--            1.0 
-- 
-------------------------------------------------------------------------------

architecture s_dmn of e_Deriv is
  quantity vin across input to electrical_ref;
  quantity vout across iout through output to electrical_ref;
  constant num : real_vector := (0.0, 1.0);
  constant den : real_vector := (1.0, 0.0);
begin
  vout == K * vin'ltf(num, den);        -- Laplace transform of input
end architecture s_dmn;

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