Input isolation circuit for computer-controlled medical device

Details Input isolation circuit for computer-controlled medical device Input isolation circuit for computer-controlled medical device

1991-08-07

1993-11-30

Envall, Jr., Roy N.

Boots, shoes, and leggings

36441301, 36441303, H04M 121

Patent

active

052671500

ABSTRACT:
An apparatus for communicating an electrical signal from a first portion of circuitry to a second, wherein there is no direct electrical contact between the two portions. In one embodiment, an EKG transmitter is disclosed which receives surface EKG signals from a patient, amplifies the EKG signals, modulates an oscillating carrier signal with the EKG signals, and transmits the resulting modulated signal across an optocoupled boundary. The modulated signal is then digitized directly, without demodulation, using phase progression digitization. The digitized information, from which the patient's EKG signal may be reconstructed, is then transmitted via a modem over conventional telephone lines. DC power drawn from the telephone line may be used directly to power the modem and phase progression digitizer, and may also be coupled via an isolating DC-to-DC transformer, to the frequency modulator and amplifier. For components of the patient's EKG signal which cannot be accurately re-created after modulation, separate, isolated circuitry can detect and process these components prior to modulation, and a separate optocoupled boundary can be established for conveying information about these components to the modem or digitizer.

REFERENCES:
patent: 4156430 (1979-05-01), King et al.
patent: 4527567 (1985-07-01), Fischler, et al.
patent: 4742831 (1988-05-01), Silvian
patent: 5150121 (1992-09-01), Newell et al.
"Isolating Data-Converter Signals", Electronic Design, Jun. 28, 1990, p. 102.
"Ideas for Design", Electronic Design, Jun. 28, 1990, p. 104.

Affiliated with

Also associated with

Rating

Input isolation circuit for computer-controlled medical device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Input isolation circuit for computer-controlled medical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input isolation circuit for computer-controlled medical device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2102309