The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 1986
Filed:
Nov. 22, 1982
Applicant:
Inventor:
Thomas E Shirley, Richardson, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; H03K / ;
U.S. Cl.
CPC ...
367 66 ; 367 21 ; 367 60 ; 375 27 ; 375 30 ; 3403 / ;
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.