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:
Oct. 01, 1985
Filed:
Sep. 13, 1983
Applicant:
Inventor:
Mishio Hayashi, Saitama, JP;
Assignee:
Takeda Riken Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ; 324 / ; 324 / ; 377 52 ;
Abstract
A device for determining with high accuracy the period and frequency of an input signal by taking into account the fractions of a clock signal that are normally ignored. A gate signal with an integral number of clock pulses is generated. Each fractional time is accurately measured by first and second integrators, and an up-down counter provides the difference between the fractional times for the final determination.