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:
Jan. 06, 2015
Filed:
Jul. 26, 2012
Bert Downing, Longmont, CO (US);
Donghua Gu, Superior, CO (US);
Neil T. Peacock, Broomfield, CO (US);
Bert Downing, Longmont, CO (US);
Donghua Gu, Superior, CO (US);
Neil T. Peacock, Broomfield, CO (US);
MKS Instruments, Inc., Andover, MA (US);
Abstract
A fast response output signal circuit () for a cold cathode gauge is provided to produce a fast response output signal () in addition to a voltage output signal () that is representative of the pressure in the cold cathode gauge. The fast response output signal () is either on or off, thus can be used to trigger a closing of an isolation valve or other responsive action upon a change in pressure that attains or exceeds a certain set point threshold. The fast response output signal is produced and processed with analog circuits, but the set point is produced with a microprocessor. The voltage output signal can be produced as a logarithmic function of the pressure.