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. 05, 1992
Filed:
Mar. 15, 1989
Mark L Oliboni, Boynton Beach, FL (US);
Stephen H Woltz, Boca Raton, FL (US);
George A Drapac, Boca Raton, FL (US);
Walter L Davis, Coral Springs, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A paging receiver capable of bit synchronizing to one of two data rates. The receiver has a digital phase locked loop integrated onto a single integrated circuit clocked by a single frequency crystal. The paging receiver receives and synchronizes to a POCSAG signal which may be transmitted at either 512 bits per second or 1200 bits per second. The digital phase locked loop bit synchronizes to either data rate using a single crystal frequency of 76.8 kHz. The data rate is selected by a bit in the code paging receiver's code plug. The digital phase locked loop is constructed to have a substantially constant frequency to bandwidth ratio at both data rates.