Implantable stimulation device having a low noise, low power, pr

Details Implantable stimulation device having a low noise, low power, pr Implantable stimulation device having a low noise, low power, pr

1995-04-28

1996-11-12

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 100

Patent

active

055735509

ABSTRACT:
An implantable stimulation device has a sensing amplifier circuit for amplifying low amplitude cardiac signals, while maintaining low power, to produce an output signal having a low noise level. The sense amplifier circuit includes a two-stage amplifier, a bandpass filter, and a threshold detector. The first stage comprises a linear differential amplifier which has low gain, good common mode rejection, and a current consumption proportional to the gain. The second stage is a switched-capacitor amplifier which has a programmable gain and low current consumption. The noise content of the system is low and produced substantially entirely in the switched-capacitor amplifier.

REFERENCES:
patent: 5330512 (1994-07-01), Hauck et al.
patent: 5443485 (1995-08-01), Housworth et al.

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