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:
Oct. 04, 2022
Filed:
Apr. 21, 2021
Allegro Microsystems, Llc, Manchester, NH (US);
Karel Znojemsky, Ricany, CZ;
Richard Stary, Dolni Brezany, CZ;
Allegro MicroSystems, LLC, Manchester, NH (US);
Abstract
In some embodiments, a circuit includes: a first chopping circuit configured to receive an input signal and generate a modulated signal responsive to the input signal; first and second input capacitors selectively coupled to receive a modulated signal or a common-mode voltage; an amplifier having an input and an output, the input coupled to the first and second input capacitors; an auto-zeroing circuit comprising one or more auto-zeroing feedback capacitors selectively coupled between the amplifier input and output; a gain selection circuit comprising one or more gain selection feedback capacitors coupled to the amplifier input and selectively coupled to the amplifier output or the common-mode voltage; an offset compensation circuit comprising one or more offset capacitors coupled to the amplifier input and selectively coupled to a reference voltage or the common-mode voltage; and a second chopping circuit configured to generate a demodulated signal responsive to the amplifier output.