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:
Oct. 02, 1979
Filed:
Jan. 21, 1970
Applicant:
Inventors:
Carl D Wise, Severna Park, MD (US);
Richard J Wiegand, Severna Park, MD (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
328 63 ; 328109 ; 3072 / ;
Abstract
The repetition frequency tracking apparatus utilizes the input signal to start a timer to provide the correct phase. When the timer sweeps through the right frequency, the tracker will lock to a single pulse train within a two octave frequency spectrum. After the lockup, the tracker is switched to a free running mode to provide pseudo synchronous running through durations of missing input pulses. Accurate tracking is provided by the use of an early late gate phase discriminator for phase sensing and correcting to zero, errors at all locking frequencies.