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. 15, 2014
Filed:
Mar. 03, 2011
Mark Niederberger, Einsiedeln, CH;
Vincenzo Leonardo, Wadenswil, CH;
Mark Niederberger, Einsiedeln, CH;
Vincenzo Leonardo, Wadenswil, CH;
ams AG, Unterpremstätten, AU;
Abstract
An amplifier circuit comprises a measurement path with an amplifier () for providing an output voltage (Vout) depending on a measuring current (Ipd) with a first and a second amplifier input (), and an amplifier output (). A return path of the amplifier circuit comprises a first filter (), an auxiliary amplifier () and a second filter (). In this case, the first filter () is designed to filter a DC voltage from the output voltage (Vout) and is connected to the amplifier output (). The auxiliary amplifier () serves to convert an input voltage (Vfil) into an output current (Ifil) and has a first and a second auxiliary amplifier input () and an auxiliary amplifier output (). In this case, the first auxiliary amplifier input () is connected to the first filter (). The second filter () is designed to filter noise from the output current (Ifil) and couples the auxiliary amplifier output () to the first amplifier input ().