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:
Apr. 29, 2003
Filed:
Apr. 10, 2000
Saleh R. Al-Araji, Alpharetta, GA (US);
Paul E. Quesenberry, Marietta, GA (US);
Herman A. Kruse, Winder, GA (US);
Scientific-Atlanta, Inc., Lawrenceville, GA (US);
Abstract
Systems and methods for a distortion monitoring system that detects an abnormal amount of signal distortion occurring in a transmission system. The distortion monitoring system includes a system amplifier section for amplifying and coupling an input signal to provide first and second outputs and a distortion monitoring section for processing the second output. The amount of distortion present is represented by an output from the distortion monitoring section of the system. In one embodiment, the distortion monitoring section can include an envelope detector for receiving the second output signal, a lowpass filter coupled to the envelope detector for cutting off frequencies below the Nyquist rate, and a voltage amplifier coupled to the lowpass filter for amplifying the signal. An analog to digital converter coupled to the voltage amplifier digitizes the signal, a memory buffer coupled to the analog to digital converter captures the digital data from the analog to digital converter, and a digital signal processor extracts the converted signal. In yet another embodiment, the digital signal processor includes an on-chip memory. A status monitor coupled to the output of the distortion monitoring section provides for monitoring the output signal.