Communications: electrical – Selective – Having electron beam device
Patent
1976-11-18
1978-04-11
Moskowitz, Nelson
Communications: electrical
Selective
Having electron beam device
340 155GC, 360 6, G01V 124
Patent
active
040841510
ABSTRACT:
A seismic recording system employs amplifiers, a multiplexer, and an analog-to-digital converter for converting analog seismic reflection signals obtained during seismic exploration operations to a serial output of multiplexed digital samples. An input controller restores to the digital samples the original amplitude of the seismic signals as they were received by the field recorder and scales the digital samples for later compositing into a seismic record in a central processing unit. An output controller then applies to each digital sample in the composite record a desired gain prior to recording on a magnetic tape unit.
REFERENCES:
patent: 3562504 (1971-02-01), Harris
patent: 3699325 (1972-10-01), Montgomery et al.
patent: 3895342 (1975-07-01), Mallett et al.
patent: 4021772 (1977-05-01), Cook et al.
patent: 4040002 (1977-08-01), Durand
Hager Jr. George W.
Huggett C. A.
Mobil Oil Corporation
Moskowitz Nelson
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