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, 2001
Filed:
Jul. 22, 1998
Katsuharu Chiba, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a modulation/demodulation system for an infrared data communication, a three-bit serial-to-parallel converting circuit captures an input signal in units of three bits in synchronism with an input clock, and outputs a three-bit parallel data to a decoder. This decoder converts the three-bit parallel data into a four-bit parallel data having different patterns corresponding to all different patterns of the three-bit parallel data in a one-to-one relation. In this four-bit parallel data, regardless of how the four-bit parallel data are serially arranged, the total length of the continuing “1” bits is two bits at maximum, and the total length of the continuing “0” bits is six bits at maximum. A four-bit parallel-to-serial converting circuit receives the four-bit parallel data, to serially output a serial data in synchronism with a modulation clock. Thus, the data transfer rate can be elevated in the infrared data communication.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile