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. 17, 1978
Filed:
May. 17, 1976
Applicant:
Inventors:
Donald R Duff, Mountain View, CA (US);
James O Lamb, Cupertino, CA (US);
Donald E Pezzolo, Cupertino, CA (US);
Assignee:
Fairchild Camera and Instrument Corporation, Mountain View, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G04C / ; H03F / ;
U.S. Cl.
CPC ...
58 2 / ; 58 2 / ; 328129 ; 331175 ;
Abstract
A circuit for adjusting the frequency of operation of an electronic time keeping device, which device includes a source of clock pulses. The circuit of this invention is preferably located between the source of clock pulses and the time keeping device counting circuitry, so that the clock pulses can be periodically interrupted for a programmed amount of time. Accordingly, the variable adjustment capacitor, typically employed in prior art time keeping devices, can be eliminated.