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:
Jul. 09, 2002
Filed:
Jun. 22, 2001
Andrea Baschirotto, Tortona, IT;
Paolo Cusinato, Sestri Levante, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
Fully-differential, switched-capacitor circuit having a first and second input terminal, and including: an operational amplifier having a first and a second differential input, a first and a second output terminal and a bias control terminal; a feedback network, connected between the differential outputs and the input terminals, and having intermediate nodes connected to the differential inputs of the operational amplifier; and a control circuit, including a detection network and an error amplifier. The error amplifier has a first input receiving a desired common-mode voltage, and an output connected to the bias control terminal and supplying a control voltage. The detection network has a first and a second input connected directly, respectively, to the second input terminal of the operational amplifier, and an output connected to a second input of the error amplifier, and supplying a common-mode drive voltage.