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-
- (comments in brackets are by G.HARRISON)
-
- Comments on BASIC Engineering Programs
-
- Richard B. Kolbly, PE
- Golden Rule Systems
- 5782 Turquoise Avenue
- Alta Loma, California 91701
-
-
- FILTER.ASC was originally written to run on a CP/M system under
- Microsoft MBASIC version 5.2. The formulas were derived from the
- Burr-Brown "Handbook of Operational Amplifier Active RC Networks"
- (1966). This program is confined to the multiple-feedback active
- filter. The performance of the filter is based on the s-
- parameter response from standard servo theory.
- (Program does lp, hp and bp. Enter gain as positive)
-
- MFILTER.ASC is an extension of FILTER.ASC. it allows for
- cascading of multiple-feedback filters and 'tuning' of the element
- values. In addition, a routine has been incorporated to allow
- selection of standard RETMA values for circuit elements
- automatically. The analysis portion allows multiple 'looks' at
- filter response and component changes.
- (Enter the gain, cutoff, and damping for each section & the program
- calculates the resistor and capacitor values for each section and
- the cascaded response)
-
- This program has been used to design many active filters and
- measured results have agreed with performance predicted by the
- program. Note that this program assumes an "ideal" operational
- amplifier. More precise results could be used by using NET85.ASC.
- The program NET85.ASC is an analysis program, not a design
- program, so should be used after component values have been
- determined.
-
- NET85.ASC is an adaptation of a network analysis program written
- up in a trade magazine (EDN, February 4, 1981 pp 126-133) and
- published in a BASIC-like Hewlett-Packard language for one of
- their early desktop computers. The program has been translated
- into BASIC and many "bells and whistles" added for storing and
- loading circuits and results in files for use by other programs.
- The fundemental program has not been changed.
- (Hints to use:Number nodes starting from 1. Make the higest number
- node be ground. Components can be changed by first removing the
- component by putting a negative component across it.)
-
- RFDESIGN.ASC is an adaptation of a Smith Chart program published
- in RF Design magazine for June of 1985 and has been adapted to
- run on the IBM-PC or compatable. This program does not use any
- of the advanced BASIC features, and is currently being run on a
- Zenith Z-150 with GWBASIC with excellent results.
- (Runs ok on pc using basica)
-
- SABIN.ASC is an adaptation of a signal analysis program by W.E.
- Sabin published in EDN for June,1983 (page 243). It has been
- adapted to run under Microsoft GWBASIC. SABINFIX.ASC is an
- extension of SABIN.ASC to allow more direct user controls, and a
- list of the things done, as well as allowing dual arrays to
- transform and manipulate. Also, file operations have been
- extended.
- (Removed direct statements in file. Seems to run. I do not have
- Sabins original article so am unable to check further.)
-
- (Disk.asc designs a parabolic dish and the sub-reflector for a
- Cassegrain feed. Looks ok)
-
- (Satellit.asc runs)
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