Patent · US Active

Thermal conductivity detector circuit and method for operating the same

US9903770B2 · kind B2 · utility

0Cited by

2References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Glen Eugene Schmidt · Corvallis, US
Udo Gellert · Bellheim, DE
Aosheng Wang · Eden Prairie, US

Key dates

Filing date	Mar 26, 2015
Grant date	Feb 27, 2018
Priority date	—
Expiry date	Mar 24, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01N30/8641
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A thermal conductivity detector includes a switch controllable to short-circuit the input of an amplifier to improve the thermal conductivity detector for use in gas chromatography without the need of an additional reference cell, wherein a digital signal processor calculates a transfer function of an analog signal processor from a digitized difference signal received in response to short-circuiting the input of the amplifier at a given time when solely a reference carrier fluid passes through a measuring cell, and the digital signal processor recovers a detector signal by deconvoluting the digitized difference signal with a transfer function.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.