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:
May. 19, 1992
Filed:
May. 15, 1990
Hiroshi Ishii, Nara, JP;
Masaaki Ozaki, Nara, JP;
Sharp Kabushiki Kaisha, , JP;
Abstract
The invention concerns a phase locked loop speed control circuit for controlling the speeds of two or more objects. It includes pulse generators for generating reference pulses, first counters for counting each of these reference pulses, encoders for detecting relative travelling distances of the objects, second counters for counting encoder pulses from the encoders, first subtracters for subtracting the outputs of the second counters from those of the first counters, second subtractors for subtracting the encoder pulses from the reference pulses, corrector sections for correcting the differences output by the first and the second subtractors, and adjusting sections for adjusting the movements of the objects based on the corrected differences.