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:
May. 15, 1990
Filed:
Nov. 14, 1988
Applicant:
Inventor:
Scott B Donaldson, Blacksburg, VA (US);
Assignee:
Kollmorgen Corporation, Simsbury, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
307144 ; 307145 ;
Abstract
A twenty four bit digital-to-analog converter comprising three eight bit digital-to-analog converters. The outputs of the two least significant converters are proportioned and summed together into one amplifier to form a sixteen bit converter. The most significant converter is fed to a separate amplifier. The output of the two amplifiers is summed into a square-root amplifier through various analog switches and summing resistors. Gains at the input and output of the square-root amplifier are altered according to the input level of the digital-to-analog converter in order to optimize the dynamic range and gain requirements.