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:
Mar. 11, 2014
Filed:
Jun. 07, 2012
Jean-michel Muguet, Rochefort-Samson, FR;
Jean-Michel Muguet, Rochefort-Samson, FR;
Thales, Neuilly-sur-Seine, FR;
Abstract
The invention relates to a device for neutralizing a signal obtained by modulating, on to a high frequency carrier, a useful signal delivered by a system comprising a parasitic capacitance Cp that varies over time, the device comprising a neutralizing capacitance Cn, means for providing an adjustable gain G, said means being equipped with a JFET field-effect transistor (J) equipped with a gate first electrode and drain and source second electrodes, and a control loop for providing gain G so that G×Cn permanently equals Cp by controlling the voltage on the gate first electrode of the transistor (J). The neutralizing capacitance Cn comprises a first capacitor Cneutroand a second capacitor Cneutroplaced in parallel at the output of said means for providing gain G.