Electromagnetically shielded narrow band electroencephalographic amplifier
US4679002A · kind A · utility
11Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45568
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low noise, high gain differential amplifier suitable for EEG amplification is constructed in a shielded metal enclosure, preferably on a ground plane circuit board. The amplifier is battery powered to eliminate all possibility of noise from the power system. The amplifier utilizes a pair of operational amplifiers to provide high input impedance for each of two input signals. A differential amplifier generates an internal signal which is filtered and amplified by a pair of bandpass amplifiers and overlapping low pass and high pass amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.