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:
Feb. 13, 2001
Filed:
Mar. 03, 1999
Stephen John Penney, Northolt, GB;
Thorn Security Limited, Middlesex, GB;
Abstract
An amplification circuit for use with an electro chemical cell is disclosed. The cell is operated in the amperometric mode and finds beneficial application in the detection of carbon monoxide (CO) gas. The amplification circuit of the invention is used to derive electrical output signals from the cell whilst ensuring that the cell electrodes are held at a potential that minimises cross-sensitivities and controlling voltage spikes which the cell would otherwise extend in duration, due to its capacitive behaviour, and comprises an operational amplifier connected to derive electrical output signals from the cell and having a feedback path incorporating at least one component of a current mirror circuit.