Pacer sense amplifier

Details Pacer sense amplifier Pacer sense amplifier

1985-05-06

1986-06-24

Kamm, William E.

Surgery

Truss

Pad

128902, A61N 100

Patent

active

045962529

ABSTRACT:
A pacemaker sense amplifier circuit exhibiting a very high common mode rejection ratio for detecting intracardiac electrogram signals is disclosed. The circuit includes a sampling capacitor which is differentially charged by the intracardiac signal. The voltage stored on the sampling capacitor is periodically applied to a high input impedance differential voltage amplifier which is referenced to the battery ground. The signal is smoothed and reconstructed by a bandpass filter, and is applied to a comparator to generate a logic level pulse indicative of the occurrence of a cardiac depolarization.

REFERENCES:
patent: 4459996 (1984-07-01), Teele
patent: 4467813 (1984-08-01), Schomburg
patent: 4494551 (1985-01-01), Little, III et al.
patent: 4510944 (1985-04-01), Porges

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