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diff --git a/fpga/usrp1/models/pll.v b/fpga/usrp1/models/pll.v
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+++ b/fpga/usrp1/models/pll.v
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+// -*- verilog -*-
+//
+//  USRP - Universal Software Radio Peripheral
+//
+//  Copyright (C) 2003 Matt Ettus
+//
+//  This program 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.
+//
+//  This program 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 this program; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+//
+
+// Very simple model for the PLL in the RX buffer
+
+module pll (inclk0,c0);
+   
+   input	  inclk0;
+   output	  c0;
+
+   assign 	  c0 = #9 inclk0;
+      
+endmodule // pll
+
+