Unsaturable sense amplifier for pacer system analyzer

Details Unsaturable sense amplifier for pacer system analyzer Unsaturable sense amplifier for pacer system analyzer

1985-05-28

1987-07-07

Kamm, William E.

Surgery

Truss

Pad

128419PT, 128901, 128902, A61B 504

Patent

active

046779868

ABSTRACT:
An unsaturable cardiac sense amplifier includes first and second amplifying stages, each of which is subject to saturation by excessive input voltage. Input voltage to the first amplifier stage is limited to less than a saturating level by means of a pair of parallel, oppositely sensed, diodes. Saturation of the second amplifier stage is prevented by a degenerative feedback loop formed by a pair of serially connected zener diodes. An artifact squelch circuit, connected to the output of the second amplifier stage, limits the maximum output voltage of the sense amplifier.

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A New Electronic System for the Detection of Stimulated Cardiac Response, J. Mugica, B. Lazarus, D. Delle-Vedove, Y. Lallemand, O. Hubert.

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