Initialization circuit
US4106498A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/043
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.