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:
Nov. 04, 1980
Filed:
Aug. 24, 1978
Carl T Jagatich, Chagrin Falls, OH (US);
Ohio Nuclear, Inc., Solon, OH (US);
Abstract
The video speed logarithmic analog-to-digital converter includes a plurality of parallel paths. In a first path, a plurality of comparators compare an analog input signal with a plurality of logarithmically incremented first reference signals. The number of first reference signals which fail to exceed the analog input signal is converted into a binary representation of the most significant bits of the logarithm of the analog input signal. A second parallel path determines the least significant bits by producing a logarithmically attenuated analog input signal and comparing the attenuated analog input signal with a plurality of logarithmically incremented second reference signals. The number of second reference signals which fail to exceed the attenuated analog input signal is converted into a binary representation of the least significant bits of the logarithm of the analog input signal. A sample and hold circuit having one input, N outputs, N+1 temporary storage paths, and a control for cyclically connecting the stored analog values with the outputs is connected with the logarithmic converter.