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. 07, 2023
Filed:
Apr. 27, 2020
Em Microelectronic-marin SA, Marin, CH;
Yonghong Tao, Singapore, SG;
EM MICROELECTRONIC-MARIN SA, Marin, CH;
Abstract
A sensor interface circuit () for an amperometric electrochemical sensor (). The circuit includes: a current-to-voltage converter (, Rf) connected to a first terminal (WRK) of the sensor () for converting an electric current through the sensor () to a voltage at an output terminal () of the current-to-voltage converter (, Rf); a first amplifier () connected between a second terminal (REF) and a third terminal (CNTR) of the sensor () for maintaining a substantially fixed voltage difference between the first and second terminals (WRK, REF) of the sensor (); a power supply () for powering the voltage converter (, Rf) and for powering a first portion () of the first amplifier (); and a negative voltage converter () configured to power a second portion of the first amplifier () through its low-side supply terminal (), while a high-side supply terminal () of the second portion of the first amplifier () is configured to be connected to the power supply ().