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:
Aug. 15, 1978
Filed:
Jun. 14, 1977
Applicant:
Inventors:
Erhard Graf, Bevaix, CH;
Jean-Pierre Wiedmer, Neuchatel, CH;
Assignee:
Oscilloquartz Sa, Neuchatel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ;
U.S. Cl.
CPC ...
331 / ; 331-3 ; 331 11 ; 331 17 ; 331 25 ;
Abstract
A control device for accurately maintaining the frequency of a quartz crystal oscillator. The control device includes reference oscillators and two control loops in parallel, a first digital control loop providing coarse adjustment of the quartz oscillator frequency and a second, analog control loop providing fine adjustment.
Graf, Erhard. (1978). Parallel analog and digital control loops for phase locking precision (U.S. Patent No. 4107623). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4107623
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile