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:
Sep. 24, 1991
Filed:
Apr. 02, 1990
Applicant:
Inventors:
Wolfram Ernst, Munich, DE;
Gerhard Uhlig, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
375108 ; 331-2 ; 331 49 ; 328120 ; 375119 ;
Abstract
In order to replace a reference clock s.sub.R, as needed, and without phase shift, with another clock f, the latter clock must be synchronized to the reference clock in frequency and in phase. Since the reference clock can fail or can be disturbed, undesirable synchronizations often occur in such cases. An error-free, phase-wise optimal synchronization of the two clocks is achieved and synchronization is carried out as a rule only when a defined edge of the reference clock appears within a time range defined with reference to the clock f.