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diff --git a/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/biquad.h b/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/biquad.h
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+++ b/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/biquad.h
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+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  biquad.h -- 
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+/* Filename biquad.h */
+/* This is the interface file for synchronous process `biquad' */
+
+#include "systemc.h"
+
+SC_MODULE( biquad )
+{
+  SC_HAS_PROCESS( biquad );
+
+  sc_in<float>  in;
+  sc_in<bool>   reset;
+  sc_out<float> out;
+
+  int num_taps; //internal variable
+  float Del[4]; //internal variable
+  float Cte[5]; //internal variable
+
+  // Constructor 
+  biquad( sc_module_name NAME,
+	  sc_signal<float>& IN1,
+	  sc_signal<bool>& RESET,
+	  sc_signal<float>& OUT1 )
+  {
+    in(IN1); reset(RESET); out(OUT1);
+
+    // initialize the coefficient matrix
+    Cte[0] = 1.0;
+    Cte[1] = 2.0;
+    Cte[2] = 1.0;
+    Cte[3] = 0.75;
+    Cte[4] = -0.125;
+    Del[0] = Del[1] = Del[2] = Del[3] = 0.0;
+
+    SC_METHOD( entry );
+    sensitive << in << reset;
+  }
+
+  // Process functionality in member function below
+  void entry();
+};