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-- ---------------------------------------------------------------------
--
-- $Id: precharged_capacitor.ams,v 1.1 2002-03-27 22:11:17 paw Exp $
-- $Revision: 1.1 $
--
-- ---------------------------------------------------------------------

-- This is a model of discharging of a precharged capacitor
-- Break statement has been used here to set the initial 
-- value of the voltage to which the capacotor was charged
-- authors: Shishir Agrawal
--          Vikram
--          Sanjiv Pandey

PACKAGE electricalSystem IS
    NATURE electrical IS real ACROSS real THROUGH Ground REFERENCE;
    FUNCTION SIN(X : real) RETURN real;
    FUNCTION EXP(X : real) RETURN real;
    FUNCTION SQRT(X : real) RETURN real;
    FUNCTION POW(X,Y : real) RETURN real;
END PACKAGE electricalSystem;

use work.electricalsystem.all;

ENTITY RC IS
END;

ARCHITECTURE behav OF RC IS
    TERMINAL n1,n2: ELECTRICAL;
    QUANTITY v_in ACROSS i_in THROUGH  n1;
    QUANTITY u_r ACROSS i_r THROUGH n1 TO n2;
    QUANTITY u_c ACROSS i_c THROUGH n2;
BEGIN


    b1: BREAK  u_c => 0.5;       	--initvalue

    e1: v_in == 0.0;      			--constant  voltage source
    e2: i_r  == u_r  / 1000.0;      --resistor  equation
    e3: i_c  == 1.0e-6 * u_c'dot;   --capacitor equation
END;