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. 13, 1988
Filed:
Oct. 09, 1987
Joseph F Chiappetta, Trumbull, CT (US);
Microphase Corporation, Norwalk, CT (US);
Abstract
A detector circuit for radio-frequency signals is formed of a pair of matched diodes disposed on a common substrate which is heated by a temperature responsive feedback circuit to stabilize the temperature of the substrate and the diodes. A capacitor is connected to one or both of the diodes to form a detector of the detector circuit. A bias circuit provides equal bias currents to the two diodes, and an amplifier is connected to the two diodes to extract voltages associated with the bias currents, and to subtract these voltages in a differential manner so as to exclude the effect of bias voltage from an output signal of the amplifier. The amplifier is also coupled to an output terminal of the detector to isolate the detector from subsequent stages of signal processing, as well as to amplify detected signals. The diodes are each, preferably, Schottky diodes for improved dynamic range of signal detection.