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:
Sep. 20, 2005
Filed:
Apr. 29, 2004
Daniel S. Cohen, Baltimore, MD (US);
Daniel J. Meyer, Woodstock, MD (US);
Daniel S. Cohen, Baltimore, MD (US);
Daniel J. Meyer, Woodstock, MD (US);
Atmel Corporation, San Jose, CA (US);
Abstract
A dual phase pulse modulation (DPPM) decoder circuit processes a DPPM signal, which is in the form of a series of high and low pulses whose pulse widths represent successive groups of M data bits, so as to recover data carried by the signal. Each of the 2possible data values of an M-bit group corresponds to one of 2distinct pulse widths. Circuit blocks determine the width of each pulse by piping the DPPM signal through a short delay chain and using the delayed outputs to clock flip-flop registers to sample the non-delayed signal. The registered output is interpreted by logic gates to obtain the corresponding M-bit groups. The decoder circuit may have two substantially identical pulse width determining blocks, one receiving the DPPM signal for measuring high pulses, and the other receiving an inverted DPPM signal for measuring the low pulses.