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:
Aug. 05, 2008
Filed:
Jun. 14, 2002
Frederick L. Martin, Plantation, FL (US);
Robert E. Stengel, Pompano, FL (US);
Edwin E. Bautista, Chesapeake, VA (US);
Frederick L. Martin, Plantation, FL (US);
Robert E. Stengel, Pompano, FL (US);
Edwin E. Bautista, Chesapeake, VA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Phase shift key modulators () are provided in which a multiphase signal source (-) is used to generate a plurality of phases of a carrier signal. A selector () is used to select one phase or a sequence of phases of the carrier signal to represent each bit pattern that is received from a binary data source (). The multiphase signal source preferably comprises a multiphase oscillator that includes a phase locked ring of variable propagation delay inverters (). Preferably, a phase sequencer () is used to select a monotonic sequence of phases to represent each bit pattern. Preferably two phase selectors () are used to simultaneously select two phases of carrier signal, and a phase interpolator () is used to generate a sequence of phases from the two phases selected by the two phase selectors ().