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. 06, 2002
Filed:
Aug. 31, 2000
Applicant:
Inventors:
Mark S. Wight, Ottawa, CA;
Stephane Gagnon, Ottawa, CA;
Assignee:
Nortel Networks Limited, St. Laurent, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 1/930 ; H03K 1/900 ;
U.S. Cl.
CPC ...
G01R 1/930 ; H03K 1/900 ;
Abstract
A peak detector for measuring the voltage amplitude of low amplitude balanced digital signals. The N-diode peak detector uses the non-linear characteristics of a diode to convert a high speed low amplitude input signal into a DC voltage, linearly proportional to the signal amplitude (peak). A compensation circuit is designed to match the characteristics of a digital modulation signal and track over a large range of temperatures and signal amplitudes. The circuit can be used for digital and analog modulation signals. For analog signals, the peak detector uses a larger number of diodes or a reduced range.