NOTE: Use Notepad to print this document        4/14/94

1.0 INTRODUCTION:

FAISYN is a low cost, effective alternative to expensive commer-
cial filter synthesis packages.  The program has been used 
successfully to design countless lumped element filters and 
diplexers from 10's of KHz to 1.5GHz  and is the result of many 
years experience in filter design.  Many designers know that 
filter design is often an iterative process.  In the old days a 
lot of tedious number grinding was required to arrive at an 
optimal solution.  FAISYN eases the burden by allowing the 
designer to quickly synthesize a variety of circuits that can 
be simulated and compared using your favorite circuit simulator 
( FAISYN currently supports PSPICE-TM Microsim, MMICAD-TM 
Optotek and TOUCHSTONE-TM HP/EESOF circuit formats).

NOTE: An evaluation version of PSPICE capable of running FAISYN 
filter circuits is available at very low cost from Microsim Corp. 

1.1 INSTALLATION:
 Under DOS
The best approach is to save the all the files contained in 
FAISYN20.ZIP in a directory labeled FAISYN. Then type FAISYN at 
the command prompt as in the examples that follow.

Example:     
		c:\FAISYN>FAISYN
OR
		C:\>FAISYN      --> Assuming the dir FAISYN is 
				    in your path.

 Under Windows
FAISYN works just fine when run as a DOS application under 
Windows.  Copy all the files from FAISYN20.ZIP into the directory 
FAISYN.  In Windows, click on File-New to pop up the New 
Program Object dialog box.  Click Program Item and then OK, this 
causes the Program Item Properties dialog box to pop up.  Type 
"FAISYN" in the Description Box, "c:\faisyn\faisyn.exe" in the 
Command Line Box and "c:\faisyn" in the Working Directory box. 
Click OK to finish.  

Alternatively, the program my be started in a window by typing 
c:\faisyn\faisyn.pif in the Command Line Box.  

You may want to change the font size when running in a window 
so you can see the entire menu.  This is done while running 
FAISYN in the windowed mode and then clicking on the file draw 
icon in the upper left corner of the window and the "Fonts" 
submenu, etc (much easier than it sounds).

1.2 RUNNING FAISYN FOR THE FIRST TIME:

The best way to get a feel for how the program works is by select-
ing all the default settings as you work your way through the 
menus.  If you make a mistake, just keep on going, you will 
get an opportunity to fix it on the next pass through the design. 

FAISYN uses modern filter design theory to compute lumped element 
low, high and bandpass filters.  All filters are based on 
normalized low pass prototypes. The initial design menu will 
prompt you for the termination resistances and the filter order.  
Subsequent menus will prompt for the filter type, which can be 
Butterworth, Chebyshev or user defined (more about that later...),
and will identify design options when available.  

A normalized low pass prototype will be displayed based on these 
initial design parameters. At this point the user will choose to 
transform the circuit into the lowpass, highpass or bandpass 
domains.  Select "Start a new low pass prototype" at the 
appropriate menu to begin a new design.

The "Enter prototype from table" option under the desired response
menu allows users to enter normalized "gn" values from the many 
tables available in the literature.  This allows the user to 
design more specialized responses (Gaussian etc.) without having 
to go through the frequency transformation or impedance scaling by
hand.

2.0 REGISTRATION:

There are many enhancements planned for the program, however the 
rate at which these will be implemented will depend on the 
response from the user community.  FAISYN is SHAREWARE and is not
free.  The beauty of shareware is that it allows the user to try 
the software for a period of time to determine if it is truly 
useful before paying for it.  Registering the product gives me
motivation to make improvements and allows me to cover some of
the costs involved (software, books & hardware, etc).  So try it 
for thirty days and let your conscience be your guide!  

For those of you without a conscience (just kidding!) I have add-
itional incentive.  For five dollars plus the registration fee of 
$20.00 you can receive a set of application notes and a free 
update to the windows version (in development) of FAISYN.  

Note that program updates will be obtained from Bulletin boards, 
friends or ShareWare distributors.  All registered users will be 
notified when these occur and where they can be down loaded.



2.1 "IN THE WORKS":

Among the enhancements being planned are distributed filter 
design capability.  In fact, the routines for edge coupled 
band pass filters have been recently  been completed.  

Another product FAISYN-MATCH is also "in the works". FAISYN-MATCH 
aids in the design of broad band impedance matching networks and 
has been used to design state of the art high dynamic range RF 
and Microwave amplifiers. These are real world production 
designs, both discrete and monolithic. Again, registered users 
will be notified when this product is released.

Comments and suggestions for future releases are welcome and 
greatly appreciated.



			 Kevin Faison
			 Carriage House Engineering
			




3.0                     License Agreement
			-----------------

The use of FAISYN is subject to the following terms and condi-
tions.

FAISYN is copyrighted material. It is protected by the copy-
right laws of the United States. You may not make any changes
or modifications to FAISYN. You may not decompile, disassemble
or otherwise reverse engineer the software in any way.

You may use FAISYN on a trial basis provided you do not violate
the protection afforded the licensed software by the copyright
laws, and you agree to the terms of the license agreement. If 
you continue to use FAISYN past a 30 day evaluation period you
are obligated to purchase a license for its use.

You may use FAISYN on a Local Area Network providing that a 
license is obtained for the number of users that may concurrent-
ly use the software.  Information on site licenses is available
by calling the author.

A license for the use of FAISYN (DOS version) can be obtained 
by sending a $20.00 registration fee to: 
			
		Kevin Faison
		Carriage House Engineering
		16 West Pleasant Hill Rd.
		Owings Mills, MD 21117
		(410)356-7088
 
	(No credit cards are accepted at this time)
	(Please do not call after 7:00PM EST)

The license fee paid for FAISYN is a one time fee.  Licensed 
users may obtain and use future revisions of FAISYN (DOS 
Versions only) by Carriage House Engineering without re-
registration.  For a registration fee of $25.00 the user 
will receive a set of filter application notes and a free 
update to FAISYN (Windows version) when it becomes available.

**********************************************************
*    An order form is supplied in the file ORDER.FRM for *
*    your convenience!                                   *
**********************************************************

Title to the licensed software is NOT transferred to the end 
user.  The end user is granted an exclusive license to use the
software on one computer or computer work station at any given 
time.

4.0                     Limited Warranty
			----------------

Carriage House Engineering does not warrant that the licensed 
software will meet your requirements or that the operation of 
the software will be uninterrupted or error free.  The warranty
does not cover any media or documentation which has been 
subjected to damage or abuse by you or others. The software 
warranty does not cover any copy  of the licensed software which
has been altered or changed in any way.

ANY IMPLIED WARRANTIES INCLUDING ANY WARRANTIES OF MERCHANT-
ABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE
TERM OF THE EXPRESS WARRANTIES. Some States do not allow limit-
ations on how long an implied warranty lasts, so the above 
limitation may not apply to you.

The warranties set forth above are in lieu of any and all other
express or implied warranties, whether oral, written, or implied,
and the remedies set forth above are the sole and exclusive 
remedies.

Carriage House Engineering is not responsible for any problems 
or damage caused by the licensed software that may result from 
using the licensed software. This includes, but is not limited 
to, computer hardware, computer software, operating systems, 
and any computer or computing accessories. End user agrees to 
hold Carriage House Engineering harmless for any problems 
arising from the use of the software.

Carriage House Engineering SHALL NOT IN ANY CASE BE LIABLE FOR 
ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT OR OTHER SIMI-
LAR DAMAGES ARISING FROM ANY BREACH OF THESE WARRANTIES EVEN IF 
Carriage House Engineering OR ITS AGENTS OR DISTRIBUTORS HAVE 
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  Some states 
do not allow the exclusion or limitation of incidental or con-
sequential damages, so the above limitation or exclusion may 
not apply to you.

In no case shall Carriage House Engineering's liability exceed 
the license fees paid for the right to use the licensed software.


5.0                     FAISYN Distribution
			-------------------


You are granted a limited license to copy FAISYN only for the 
trial use of others subject to the terms of this software 
license agreement described herein, and the conditions 
described below are met:

FAISYN MUST be copied in an unmodified form and MUST contain 
the following files:
			FAISYN.exe
			FAISYN.txt
			Order.frm

No fee, charge or other compensation may be accepted or 
requested by anyone without the express written permission
of Carriage House Engineering.

Public Domain Disk Vendors may not charge a fee for FAISYN 
itself. However you may include FAISYN on a diskette for which
you charge a nominal distribution fee. The purchaser of said
diskette must be informed in advance that the fee paid to 
acquire the diskette does NOT relieve said purchaser from 
paying the Registration Fee for FAISYN if said purchaser uses
FAISYN.

Operators of electronic bulletin board systems (Sysops) may 
post FAISYN for downloading by their users without written 
permission only as long as the above conditions are met.  A
fee may be charged for access to the bbs as long as no specific
fee is charged for downloading FAISYN files without first 
obtaining express written permission from Carriage House 
Engineering to charge such a fee.

Distributors of public domain and user supported software, 
such as disk vending services, may not charge a fee for FAISYN
itself. However you may include FAISYN on a diskette for which
you charge a nominal distribution fee. The purchaser of said 
diskette must be informed in advance that the fee paid to 
acquire the diskette does NOT relieve said purchaser from 
paying the Registration Fee for FAISYN.

The above constitutes the license agreement for FAISYN.  It 
supersedes any and all previous license agreements.
