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diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/AMS_CS3_Power_Systems/comp_2p2z.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/AMS_CS3_Power_Systems/comp_2p2z.vhd
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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.math_real.all;
+library ieee_proposed;  use ieee_proposed.electrical_systems.all;
+
+entity comp_2p2z is
+  generic ( gain : real := 100.0;   -- high DC gain for good load regulation       
+            fp1 : real := 7.5e3;    -- pole location to achieve crossover frequency
+            fp2 : real := 531.0e3;  -- pole location to cancel effect of ESR 
+            fz1 : real := 403.0;    -- zero locations to cancel L-C filter poles
+            fz2 : real := 403.0 );
+  port ( terminal input, output, ref : electrical );
+end entity comp_2p2z;
+
+----------------------------------------------------------------
+
+architecture ltf of comp_2p2z is
+
+  quantity vin across input to ref;
+  quantity vout across iout through output to ref;
+  constant wp1 : real := math_2_pi * fp1;  -- Pole freq (in radians)
+  constant wp2 : real := math_2_pi * fp2;
+  constant wz1 : real := math_2_pi * fz1;  -- Zero freq (in radians)
+  constant wz2 : real := math_2_pi * fz2;
+  constant num : real_vector := ( 1.0,
+                                  (wz1 + wz2) / (wz1 * wz2),
+                                  1.0 / (wz1 * wz2) );
+  constant den : real_vector := ( 1.0e-9, 1.0,
+                                  (wp1 + wp2) / (wp1 * wp2),
+                                  1.0 / (wp1 * wp2) );
+
+begin
+
+  vout == -1.0 * gain * vin'ltf(num, den);
+
+end architecture ltf;