Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1982-11-22
1986-10-07
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 21, 367 60, 375 27, 375 30, 340347M, G01V 124, H03K 1301
Patent
active
046163492
ABSTRACT:
An analog-to-digital converter for use in seismic data processing applications is disclosed which features variants on delta modulation and delta-sigma modulation methods. A series of single bits is output by an analog-to-digital converter based on comparison of a predicted analog signal with the actual analog signal. A low pass filter and subsampling operation is applied to the output digital bits to provide digital words corresponding to the analog signal amplitude. Plural integrator stages are shown which allow reduction of quantization error.
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Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Moskowitz Nelson
Speciale Charles J.
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