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. 14, 2020
Filed:
Jan. 04, 2019
Applicant:
Infineon Technologies Ag, Neubiberg, DE;
Inventors:
Cecilia Carbonelli, Munich, DE;
Renato Bessegato, Oberhaching, DE;
Wolfgang Furtner, Fuerstenfeldbruck, DE;
Assignee:
INFINEON TECHNOLOGIES AG, Neubiberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/17 (2006.01); G01N 21/3504 (2014.01); G01N 29/46 (2006.01); G01N 29/42 (2006.01); G01N 29/32 (2006.01); G01N 29/24 (2006.01); G01N 29/34 (2006.01); G10K 11/178 (2006.01); G01N 33/00 (2006.01);
U.S. Cl.
CPC ...
G01N 21/3504 (2013.01); G01N 21/1702 (2013.01); G01N 29/2418 (2013.01); G01N 29/32 (2013.01); G01N 29/343 (2013.01); G01N 29/42 (2013.01); G01N 29/46 (2013.01); G01N 33/004 (2013.01); G10K 11/17853 (2018.01); G10K 11/17883 (2018.01); G01N 2021/1704 (2013.01); G01N 2291/021 (2013.01); G01N 2291/02809 (2013.01); G10K 2210/3028 (2013.01);
Abstract
In accordance with an embodiment, a method of measuring a gas concentration includes modulating an infrared light source according to a frequency-hopped sequence or according to a pulse sequence, receiving a microphone signal from an output of a microphone acoustically coupled to a gas exposed to infrared light produced by the infrared light source; bandpass filtering the microphone signal using a bandpass filter; and estimating the gas concentration from the filtered microphone signal.