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:
Dec. 19, 2000
Filed:
Dec. 01, 1998
Jerry Hongbin Hao, San Jose, CA (US);
Bill Kolb, Sunnyvale, CA (US);
Philips Electronics North America Corp., New York, NY (US);
Abstract
An autobaud method for automatic detection of baud rate and character configuration of a received asynchronous serial data stream by detecting a first predetermined two character sequence in uppercase and lowercase form, notably 'AT' and 'at', from patterns of signal states and their durations, also provides for detecting a second predetermined two character sequence of 'A/' and 'a/' and for substantially immediate automatic echoing of the first and second predetermined character sequences if autoechoing is enabled. The baud rate and character configuration used for subsequent characters is not be changed unless, after the autobaud function is enabled, the first predetermined two character sequence in either uppercase or lowercase form is received, and a different baud rate and/or character configuration is determined from the received pattern of signal states and their durations. The baud rate is determined by measuring the duration of a signal state begun by an apparent transition from a stop bit or idle state, and determining whether the measured duration falls within any of a set of predetermined bit time ranges or legal windows, each corresponding to a different baud rate of a set of predetermined standard baud rates.