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:
Dec. 06, 1983
Filed:
Jun. 25, 1980
Applicant:
Inventor:
Steven M O'Brien, PA, US;
Assignee:
Sperry Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
328 72 ; 307269 ; 307518 ; 328104 ; 331 49 ;
Abstract
A switching circuit for automatically selecting one of a plurality of normally operable asynchronous oscillators is provided with a selection switch for selecting a new oscillator while the formerly selected oscillator is still producing an output. The switching circuit employs the output of the newly selected oscillator to disable the formerly selected oscillator and to subsequently enable the output of the newly selected oscillator to be coupled to the oscillator output of the switching circuit, thus, preventing switch-over from one oscillator to the other during a metastable period.