Implantable cardiac stimulator with automatic gain control

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

A - Human Necessities

61

N

326/1.1

A61N 1/36 (2006.01) A61N 1/37 (2006.01)

Patent

CA 1327232

ABSTRACT OF THE DISCLOSURE 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.

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