Gain control for a periodic signal and method regarding same
US5895360A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1996 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3704
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A gain control method for providing a gain controlled signal representative of a periodic physiological parameter of a patient includes providing a signal characteristic of the periodic physiological parameter. The periodic physiological parameter includes a plurality of periodic cycles. Gain of the signal is updated only once per periodic cycle following detection of a periodic event. The updating is performed by monitoring an amplitude of the signal between detection of periodic events and comparing the amplitude to a gain control amplitude threshold. Gain of the signal is updated as a function of the comparison. Further, gain is updated following expiration of a predetermined period of time if a periodic event is not detected within the predetermined period of time. The physiological parameter may be respiratory effort. An apparatus for providing such gain control is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.