Initialization circuit

Details Initialization circuit Initialization circuit

1976-12-27

1978-08-15

Michell, Robert W.

Surgery

Truss

Perineal

324125, A61B 502

Patent

active

041064984

ABSTRACT:
In a blood pressure measuring system in which a pressure signal comprised of both applied pressure and pulsatile pressure is detected and subsequently filtered to separate the pulsatile pressure component, circuitry is provided to minimize start-up transients in the separated signal. Such start-up transients, which normally persist for some time after start-up as a result of the AC time constants of the filters, are otherwise capable of generating erroneous measurements. The circuitry initializes the filters by clamping their outputs to predetermined voltage levels during a start-up interval and thereby avoids the generation of the transients.

REFERENCES:
patent: 3453486 (1969-07-01), Weber
patent: 3539922 (1970-11-01), Brockman
patent: 3841314 (1974-10-01), Page
patent: 3859602 (1975-01-01), Janssen et al.
patent: 3863152 (1975-01-01), Wernite
patent: 3995624 (1976-12-01), Maas
Plumb, J. L. et al., "A Noise Suppressor for Neurophysiological Recording of Inpulse Activity," IEEE Trans, vol. BME-11, No. 4, Oct. 1969, pp. 157-159.

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