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Primary Examiner: Gruber, Felix D.
Assistant Examiner:
Attorney: Wilson; David H.

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Title: Signal averaging circuit

Abstract: An averaging circuit for producing average boat speed and average apparent wind speed which in cooperation with average apparent wind direction are utilized to determine the performance characteristics of sailing boats. Instantaneous values of the speed parameters are sampled at a predetermined frequency and a running average of N samples is generated by adding the most recent sample and discarding the oldest sample at periodic intervals. Display of the wind speed is delayed with respect to the display of boat speed to compensate for the effect of the inertia of the boat.

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Inventors: Taylor, Lucian W. (Los Altos, CA, US)
Yarborough, Jr., John M. (Palo Alto, CA, US)

Application Number: 500964
Filing Date: 1974-09-12
Publication_date: 1976-02-03
Assignee: Velcon Filters, Inc. (San Jose, CA)
Primary Class(es): 708/445 324/166, 377/49, 702/46, 702/144
Other Classes:
US Patent Ref:

2769595	Nov, 1956	Bagley	235/92.
2851596	Sep, 1958	Hilton	235/92.
3276256	Oct, 1966	Rudasil et al.	235/92.
3505673	Apr, 1970	James	235/150.
3538317	Nov, 1970	Fukuda	235/183.
3550018	Dec, 1970	James et al.	235/150.
3614617	Oct, 1971	Blake	324/166.
3639753	Feb, 1972	Reich	324/166.
3729996	May, 1973	Metz	324/166.
3754121	Aug, 1973	Delay	235/92.
3807630	Apr, 1974	Stewart	235/183.

Other Refs: Other References: Shulman: Accurate Tachometry Methods with Electronic Counters. Nov. 1954. AIEE Transactions TK6,A1 Vol. 73 Part 1 pp. 452/455.