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:
Feb. 05, 1991
Filed:
Jan. 30, 1990
Applicant:
Inventors:
John M Wynne, Dooradoyle, IE;
Michael Byrne, Ballysheedy, IE;
Assignee:
Analog Devices, BV, Limerick, IE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341147 ; 341151 ; 341136 ; 341154 ;
Abstract
A converter for producing the function V.sub.out =V.sub.bias =V.sub.swing (1-2D), in which a DAC is combined with an operational amplifier and (typically) three or four resistors. A function of the voltage V.sub.swing, or a current corresponding thereto, is applied to the reference voltage input terminal of the DAC. The variable D is the DAC's digital input code, expressed as a decimal or fraction in the range between 0 and 1. The DAC output provides a suitably scaled and signed signal which is added to or subtracted from the offset signal V.sub.bias to produce V.sub.out.