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:
Aug. 15, 2023
Filed:
Nov. 24, 2021
Applicant:
Thermo Fisher Scientific (Bremen) Gmbh, Bremen, DE;
Inventors:
Peter Komander, Bremen, DE;
Heinz Lerche, Bremen, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 49/02 (2006.01); H01J 49/26 (2006.01); H03F 3/04 (2006.01); G01T 1/24 (2006.01);
U.S. Cl.
CPC ...
H01J 49/022 (2013.01); G01T 1/247 (2013.01); H01J 49/025 (2013.01); H01J 49/26 (2013.01); H03F 3/04 (2013.01);
Abstract
An ion detection current conversion circuit includes a conversion amplifier coupled with a conversion resistor assembly for converting an ion detection current produced by an ion detector into an ion detection voltage, the conversion resistor assembly comprising a resistor having a high resistance and a capacitive compensation element, and a compensation voltage circuit for deriving a compensation voltage from the ion detection voltage and feeding the compensation voltage to the capacitive compensation element, the compensation voltage circuit comprising a variable resistor for adjusting the compensation voltage.