\"  feedback.roff from ObjectProDSP 0.2
\"  Copyright (C) 1994 1995, Mountain Math Software, All rights reserved.
\"  Licensed for free use and distribution under version 2 of the Gnu General
\"  Public License. Please see file COPYING for details and restrictions.
\"  
\"  ObjectProDSP is a trademark of Mountain Math Software.
\"  
.H 1 "Feedback example"

This example shows a feedback loop that produces overflows.
It includes a four sample delay so the feedback loop
will not deadlock.

