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. 16, 2007
Filed:
Apr. 29, 2004
Daniel S. Cohen, Baltimore, MD (US);
Daniel J. Meyer, Woodstock, MD (US);
John L. Fagan, Pasadena, MD (US);
Daniel S. Cohen, Baltimore, MD (US);
Daniel J. Meyer, Woodstock, MD (US);
John L. Fagan, Pasadena, MD (US);
Atmel Corporation, San Jose, CA (US);
Abstract
A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2possible data values for a group of M data bits uniquely corresponds to one of 2distinct pulse widths. This modulation method is essentially clockless, with data being decoded from a signal by detecting each pulse's width with respect to the last transition. Power consumption is reduced by having M data bits represented for each pulse transition, and by using both the high and low pulses to represent data.