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:
Jun. 26, 1990
Filed:
Feb. 23, 1989
William J Howell, Chandler, AZ (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A self adjusting data detector receives a modulated carrier waveform and removes the carrier signal, leaving a bandwidth limited waveform. The bandwidth limited waveform represents a digital signal which has lost its squared edges due to the high frequency components which were suppressed during modulation, transmission, and demodulation. The self adjusting data slicer uses a first peak detector to feedback a detector bias voltage to set one peak of the bandwidth limited waveform to a predetermined level. A second peak detector is used to feedback a peak bias voltage to set the opposite peak of the bandwidth limited waveform to a second predetermined level. A data slicer is then able to accurately slice the bandwidth limited waveform at a predetermined magnitude therein recovering the original timing of the digital signal. The data slicer is able to maintain its accuracy over changing modulation levels.