The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1977
Filed:
Jun. 21, 1976
Timothy M Harrington, Sierra Madre, CA (US);
MDH Industries, Inc., Monrovia, CA (US);
Abstract
A digital circuit determines the maximum frequency present in a first pulse train and indicates when a selected fraction of this maximum frequency is exceeded in subsequent pulse trains. The invention comprises a prescaler circuit for the purpose of reducing the frequency of the input pulse train to a level suitable for a digital period-measuring circuit; a digital period-measurement circuit that measures the period of the output of the prescaler and compares that measured value to a stored value; a frequency-multiplier circuit that produces the reference frequency used to measure the period in the period-measurement circuit; and a control circuit to operate the circuits in a first mode for storing a digital value representative of the maximum frequency present in the input pulse train, and in a second mode for comparing the frequency of subsequent pulse trains with the value stored in the first mode. The control circuit produces an output signal when the frequency of the subsequent pulse train exceeds a selected fraction of the maximum frequency present in the first pulse train.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile