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:
Jan. 20, 2004
Filed:
Apr. 13, 2000
Sarkis Teghararian, Vancouver, CA;
Florin Jelea, Burnaby, CA;
Dion Michael Horvat, New Westminister, CA;
Sukhdeep Hundal, Surrey, CA;
Vtech Communications Ltd., Tai Po, HK;
Abstract
The present disclosure discloses a method and apparatus for slicing data, or “squaring up” a signal such as the output of a wireless receiver demodulator for proper interface with conventional digital logic circuits. The method involves the receiving of an input signal, the generation of a reference level, the comparison of the input signal to the reference level, and the measurement and storage of the reference level. The reference level is generated by applying the input signal to a filter, which has been previously set to an initial condition. The reference level is measured at a predetermined point in a receive data frame, and is maintained at the desired level throughout the remainder of the frame. After a frame has been received, the reference level is stored if the frame data output from the data slicer contained no errors. For multi-channel receivers, in which a different data slicer reference level may be optimal for each channel, a separate filter initial condition can be stored for each channel, and the reference level is set to the stored initial condition corresponding to the current channel prior to receiving data on the current channel.