Disk No: 1799                                                           
Disk Title: A-Filter                                                    
PC-SIG Version: S1                                                      
                                                                        
Program Title: A-Filter                                                 
Author Version: 02/15                                                   
Author Registration: $35.00                                             
Special Requirements: None.                                             
                                                                        
This program calculates the resistor and capacitor values for various   
operational amplifier based active filter circuits.  A-FILTER is menu   
driven and covers high and low pass, equal value Sallen-Key filters to  
the 4th order.                                                          
                                                                        
Calculations will simultaneously include 7 response curves for each filt
(greater than 1st order); Best delay, Compromise, Flattest, Slight dips,
1db dips, 2db dips and 3db dips.  These filter configurations can be cas
to make bandpass filters.                                               
                                                                        
The screens are laid out in a format similar to the illustrations in    
"The Active Filter Cookbook" by Don Lancaster.  The screens refer to    
pages in the book which show the shape of each curve.  Although it is   
not necessary to have this book to run A-FILTER, the book provides      
valuable additional information.                                        
                                                                        
                                                                        
PC-SIG                                                                  
1030D East Duane Avenue                                                 
Sunnyvale  Ca. 94086                                                    
(408) 730-9291                                                          
(c) Copyright 1989 PC-SIG, Inc.