Cardiac sense amplifier with pattern recognition capabilities

Details Cardiac sense amplifier with pattern recognition capabilities Cardiac sense amplifier with pattern recognition capabilities

1987-10-13

1990-04-03

Jaworski, Francis

Surgery

Truss

Pad

128696, 128901, A61N 100

Patent

active

049131460

ABSTRACT:
A cardiac sense amplifier network includes a differential amplifier, a bandpass filter, a comparator network, a microprocessor, an analog-to-digital converter, and a random-access memory. The differential amplifier is responsive to incoming electrical signals containing cardiac signals and noise signals for amplifying the electrical signals and for producing amplified electrical signals. The filter is used to filter the amplified electrical signals and for producing filtered electrical signals. The comparator network compares the filtered electrical signals with first and second reference voltages and produces a flag signal indicative of when the filtered electrical signals exceed the first or second reference voltages. The microprocessor is responsive to the flag signal for initializing the same and for generating a control signal. The analog-to-digital converter is responsive to the control signal for converting the filtered electrical signals to digital data corresponding to the cardiac signals and noise signals. The random-access-memory is used to store data representative of noise signals and for storing program instructions for causing the microprocessor to subtract the noise signals from the digital data signals in order to obtain the cardiac signals which are free of noise.

REFERENCES:
patent: 4263919 (1981-04-01), Levin
patent: 4478224 (1984-10-01), Bailey
patent: 4494551 (1985-01-01), Little, III et al.
patent: 4708144 (1987-11-01), Hamilton et al.

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