Apparatus for maintaining signals within a given amplitude range
US4153049A · kind A · utility
6Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | Nov 16, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/308
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Displayed ECG waveforms are maintained within acceptable aspect ratios without rapid fluctuation in amplitude by rapidly decreasing the gain of the signal channel by discrete amounts as the peak-to-peak amplitude of the ECG signal increases through each of a number of levels and by increasing the gain of the signal channel only after the peak-to-peak amplitude of the ECG signals has dropped to a given fraction for a predetermined period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.