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:
Jan. 18, 2022
Filed:
May. 22, 2020
Analog Devices, Inc., Norwood, MA (US);
Yoshinori Kusuda, San Jose, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Chopper amplifiers with multiple sensing points for correcting input offset are disclosed herein. In certain embodiments, a chopper amplifier includes chopper amplifier circuitry including an input chopping circuit, an amplification circuit, and an output chopping circuit electrically connected in a cascade along a signal path. The chopper amplifier further incudes a multi-point sensed offset correction circuit that generates an input offset compensation signal based on sensing a signal level of the signal path at multiple signal points. Furthermore, the multi-point sensed offset correction circuit injects the input offset compensation signal into the signal path to thereby compensate for input offset voltage of the amplification circuit while suppressing output chopping ripple from arising.