Automatic gain control for seismometer recorders
Patent
·
OSTI ID:7245487
A seismic digital recording system, that has the amplifiers placed near the geophone locations, consists of a high-speed gain-ranging amplifier of fewer bits total range than conventional field amplifiers, and a preamplifier that has a selected range of gain which can be slowly and automatically adjusted. A control system examines the bit output of the A/D converter throughout the whole record, and changes the gain of the preamplifier by 6 db on the succeeding record if needed.
- Assignee:
- Standard Oil Co.
- Patent Number(s):
- US 3947806
- OSTI ID:
- 7245487
- Resource Relation:
- Patent File Date: Filed date 10 Feb 1975
- Country of Publication:
- United States
- Language:
- English
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