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:
Oct. 25, 1994
Filed:
Mar. 18, 1993
Applicant:
Inventor:
Earl C Herleikson, Groton, MA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128696 ;
Abstract
Method and apparatus for removing baseline wander from an ECG signal. The ECG signal is filtered with a high-pass filter having a variable corner frequency. In response to finding low-frequency components in the output of the high-pass filter, its corner frequency is temporarily increased. The corner frequency may decrease according to a decay function or sensing the absence of a low-frequency component in the filter's output. The corner frequency may be decreased in response to sensing ECG activity.