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:
Nov. 11, 2025
Filed:
Sep. 01, 2021
Aarhus Universitet, Aarhus C, DK;
AARHUS UNIVERSITET, Aarhus C, DK;
Abstract
A front-end device is arranged to amplify an electric signal from an associated sensor, e.g. for amplifying an electric signal from a neural activity sensor. The front-end device has an amplifier circuit connected between its input and output terminals (Vin, Vout), wherein the amplifier circuit comprises a capacitive-coupled chopper circuit comprising a first gain element and first, second and third chopper switches arranged for operating at a chopper frequency. Further, the amplifier circuit has A) an impedance boosting auxiliary path connected to the input terminal in parallel with a first chopper switch of the CCC, wherein the impedance boosting auxiliary path comprises a pre-charging buffer, and B) a second gain element connected in a feedback path of the CCC. Such front-end device has high input impedance, and the input impedance is uncorrelated with the gain. It is highly suited for implantable micro devices, e.g. brain dusts.