Method and apparatus for increasing the dynamic range of a data acquisition system at low frequencies without reducing high frequency gain
US4321675A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jan 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A geophysical data acquisition system is disclosed having a dynamic range larger than that achievable with typical existing systems. The range of input signals that can be accommodated by a system are limited on the lower end by the noise level of the system and at the upper end by saturation levels of the system. High amplitude input signals can be accommodated by the system if certain unneeded frequency components are filtered off at a sufficiently early point in the signal flow path. In the present invention this desirable filtering is accomplished while maintaining a high gain level in the signal flow path ahead of those components which introduce high noise levels. As a result, the system has an expanded dynamic range and the needed capability to faithfully acquire low amplitude signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.