Bandpass filter clock control

Details Bandpass filter clock control Bandpass filter clock control

1990-01-19

1992-02-18

Kamm, William E.

Surgery

Truss

Pad

307521, A61N 136

Patent

active

050884905

ABSTRACT:
A switched capacitor ventricular sense amplifier for an implantable pulse generator having unique control of the switching clock for minimization of transients during the period just preceding, during and following an atrial paced event. The timing is modified to discontinue switching during this period. This ensures that transients occurring as a result of functionally disconnecting and subsequently reconnecting the sensing lead with the sense amplifier are not propagated within the switched capacitor bandpass filter. An alternative approach is to increase the clocking rate during the blanked period to ensure that the transients created by the atrial pace or by disconnecting and reconnecting the sensing lead are rapidly processed by the switched capacitor bandpass filter and that processing is completed shortly following the atrial paced event. This alternative approach requires a gate at the sense amplifier output to disable propagation of any transients processed.

REFERENCES:
patent: 4665919 (1987-05-01), Mensink et al.
patent: 4702253 (1987-10-01), Nappholz et al.
patent: 4913145 (1990-04-01), Stotts
patent: 4967747 (1990-11-01), Carroll et al.

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