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. 25, 2012
Filed:
Jun. 29, 2010
Roberto Canegallo, Rimini, IT;
Mauro Scandiuzzo, Trento, IT;
Eleonora Franchi Scarselli, Bologna, IT;
Antonio Gnudi, Bologna, IT;
Roberto Guerrieri, Bologna, IT;
Federico Natali, Bologna, IT;
Roberto Canegallo, Rimini, IT;
Mauro Scandiuzzo, Trento, IT;
Eleonora Franchi Scarselli, Bologna, IT;
Antonio Gnudi, Bologna, IT;
Roberto Guerrieri, Bologna, IT;
Federico Natali, Bologna, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A device and method to compensate for distortions of amplitude that afflict systems for communicating through capacitive coupling. A circuit includes a first transmitter stage, a first receiver stage, and a first coupling capacitor, coupled between the first transmitter stage and the first receiver stage. The first receiver stage includes a calibration amplifier of a variable-gain type coupled between the first coupling capacitor and an output of the electronic circuit. The electronic circuit includes a reference channel formed by: a transmission calibration stage; a reception calibration stage; and a reference capacitor coupled between the transmission calibration stage and the reception calibration stage. The reception calibration stage includes: a reception amplifier of a variable-gain type, having an input coupled to the reference capacitor, and a gain controller, having an input coupled to an output of the reception amplifier and an output coupled to control terminals of the reception and calibration amplifiers.