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:
Sep. 19, 2000
Filed:
Mar. 17, 1999
Applicant:
Inventor:
Stephen D Summerfield, Phoenixville, PA (US);
Assignee:
Analytical Technology, Inc., Oaks, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G08C / ;
U.S. Cl.
CPC ...
327538 ; 327 52 ; 327 53 ; 327 54 ; 327530 ; 327535 ; 326 37 ; 326 39 ; 330 96 ; 330127 ; 330129 ;
Abstract
An electrical circuit provides a variety of stable and reliable bias voltages to accommodate the bias requirements of various sensor types. The electrical circuit comprises a programmable analog circuit capable of maintaining a plurality of programmable threshold voltages and producing a plurality of intermediary voltages. Such voltages act as an input to a differential amplifier that outputs a bias voltage within a range consistent with said programmable threshold voltages. The bias voltage is further conditioned by a conditioning amplifier that further stabilizes the bias voltage to an attached sensor.