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:
Dec. 28, 1976
Filed:
Dec. 30, 1975
Franklin M Eastland, Linthicum Heights, MD (US);
Camille S Marie, Pikesville, MD (US);
Christopher B Schwerdt, Catonsville, MD (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
An amplitude modulation envelope detector comprised of a basic voltage doubler envelope detector whose linear dynamic range is increased by a forward bias network and for which the offset voltage is stabilized by temperature drift compensation provided by a temperature compensation network. The forward bias network increases the basic envelope detector linear dynamic range by clamping the basic detector to a predetermined bias voltage which takes the detector components out of the non-linear region of operation, and the temperature compensation network, which is comprised of components matched to those found in the basic envelope detector, stabilizes the offset voltage by providing a signal to the inverting input of an operational amplifier to compensate for the operating characteristic variations of the components in the basic envelope detector and the forward bias network.