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:
Sep. 05, 1989
Filed:
Aug. 01, 1988
Barry A McKibben, Beaverton, OR (US);
Edward J Cleary, Jr, Aloha, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A dual function peak metering circuit provides both monitoring and measuring functions for a composite signal having both modulated and unmodulated components. A full-wave rectified version of the composite signal is input to an envelope detector that drives a peak weighting circuit and a variable limiter. The output of the peak weighting circuit controls a threshold level for the variable limiter. The peaks of the signal at the output of the variable limiter are detected with an instantaneous peak-hold circuit that is periodically sampled and reset under microprocessor control. The microprocessor then displays the sampled value both graphically and numerically.