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:
Apr. 24, 2001
Filed:
Sep. 30, 1997
Bruce Charles Eastmond, Downers Grove, IL (US);
Richard Stanley Rachwalski, Lemont, IL (US);
Rachid Alameh, Schaumburg, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A data transmission system (,) includes a data transmission terminal (,) and a portable data device (,) that is remotely powered by the terminal. A method is provided for supplying power and data from the terminal (,) to the portable data device (,) using a carrier signal (,), including the step of identifying a slot location into which a modulation discontinuity (,) is introduced. The slot location is chosen within a modulation frame, which is based on n bits of the information signal to be transmitted, the number of slots in the frame varying between 1 and 2,. The modulation discontinuity (,) is introduced into the chosen slot location to produce an encoded data stream, which is then transmitted to the portable data device.