Implantable cardiac stimulator with automatic gain control

Details Implantable cardiac stimulator with automatic gain control Implantable cardiac stimulator with automatic gain control

1988-06-07

1990-02-27

Cohen, Lee S.

Surgery

Truss

Pad

128419P, A61N 136

Patent

active

049036998

ABSTRACT:
An implantable cardiac stimulator for detecting and treating bradycardias includes a sense amplifier responsive to sensed cardiac signals for detecting cardiac activity. The sense amplifier includes an automatic gain control amplifier, a filter and quad comparator having a pair of signal channels to establish sensing thresholds, margins and signal gain. The sense amplifier has a feedback loop containing a microprocessor which implements preselected algorithms in conjunction with the outputs of the quad comparator to variably adjust the amplifier gain and to programmably control the sensing margin.

REFERENCES:
patent: 4000461 (1976-12-01), Barber et al.
patent: 4312354 (1982-01-01), Walters
patent: 4364396 (1982-12-01), Barthel
patent: 4708144 (1987-11-01), Hamilton et al.
patent: 4766902 (1988-08-01), Schroeppel
patent: 4768511 (1988-09-01), DeCote, Jr.

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