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:
Aug. 25, 2009
Filed:
Feb. 15, 2002
Ramon Van Der Winkel, Helsingborg, SE;
Tobias Lindqvist, Sundbyberg, SE;
Ramon Van Der Winkel, Helsingborg, SE;
Tobias Lindqvist, Sundbyberg, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A communications interface device () has circuitry for receiving digital signals in the form of characters according to a protocol defining that a communications link is initialized by a series of start characters, each having a specified duration. The receiving circuitry can assume a first state in which characters can be detected, and a second state in which detection of characters is not possible. Power consumption is higher in the first state than in the second state. The device can alternate the receiving circuitry periodically between the first state and the second state with a period shorter than the duration of the series of start characters. In each period the receiving circuitry assumes the first state for a time longer than the duration of a start character. A communications link is established if a character is detected. The power consumption can be reduced considerably without causing unnecessary inconvenience and time consumption for the user.