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+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version.
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+-- for more details.
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+library ieee; use ieee.std_logic_1164.all;
+library ieee_proposed; use ieee_proposed.electrical_systems.all;
+
+entity inverting_integrator is
+ port ( terminal input, output : electrical;
+ signal rst : in std_ulogic );
+end entity inverting_integrator;
+
+----------------------------------------------------------------
+
+architecture structural of inverting_integrator is
+ terminal internal : electrical;
+begin
+
+ r1 : entity work.resistor(ideal)
+ port map ( node1 => input, node2 => internal);
+
+ c1 : entity work.capacitor(leakage)
+ port map ( node1 => internal, node2 => output );
+
+ amp : entity work.opamp(slew_limited)
+ port map ( plus_in => electrical_ref, minus_in => internal,
+ output => output);
+
+ switch : entity work.analog_switch(ideal)
+ port map ( n1 => internal, n2 => output, control => rst );
+
+end architecture structural;