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:
Mar. 13, 1979
Filed:
Sep. 23, 1974
Applicant:
Inventors:
Phillip W Ward, Dallas, TX (US);
Halbert H Bybee, Jr, Richardson, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ; 324 82 ; 324 / ;
Abstract
An all digital circuit converts a signal of an unknown frequency into an accurate binary representation of that frequency. The apparatus consists of an all digital closed loop system which has as its input the unknown signal. The closed loop system generates a reference signal and forces the frequency thereof to approximate that of the unknown signal. In so doing, the closed loop generates a binary number representative of the frequency of the reference signal and provides this number as the system output.