Notch filter noise rejection system in a cardiac control device

Details Notch filter noise rejection system in a cardiac control device Notch filter noise rejection system in a cardiac control device

1991-10-25

1993-02-23

Kamm, William E.

Surgery

Truss

Pad

A61B 50456

Patent

active

051881179

ABSTRACT:
A physiological event signal sensing system in a cardiac control or monitoring device for detecting spontaneous cardiac electrical events which may be obscured by continuous or burst EMI line frequency noise. The noise rejecting sensing system of this invention senses and samples cardiac signals which may include a noise component which is produced by power line interference in addition to a physiological signal component. The sampling frequency is selected to be an integer multiple of at least one common power line frequency. The system notch filters the cardiac signal to remove line frequency components, using either or both lowpass and highpass notch filtering coefficients, then limits the filtered output to the amplitude of the corresponding filter input to remove filter output signals caused by the sudden termination of line frequency noise which is characteristic of burst noise.

REFERENCES:
patent: 4296755 (1981-10-01), Judell
patent: 4436093 (1984-03-01), Belt
patent: 4516579 (1985-05-01), Irnich
patent: 4557266 (1985-12-01), Schober
patent: 4616659 (1986-10-01), Prezas et al.
patent: 4649931 (1987-03-01), Beck
patent: 4692719 (1987-09-01), Whigham
patent: 4708144 (1987-11-01), Hamilton et al.
patent: 4754762 (1988-07-01), Stuchl
patent: 4779617 (1988-10-01), Whigham
patent: 4821724 (1989-04-01), Whigham et al.
patent: 5048535 (1991-09-01), Maruyama
Holsinger et al., "IEEE Transactions on Biomedical Engineering", vol. BME 18, No. 3 May 1971, pp. 212-217.

Affiliated with

Also associated with

Rating

Notch filter noise rejection system in a cardiac control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Notch filter noise rejection system in a cardiac control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Notch filter noise rejection system in a cardiac control device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2198202