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:
Apr. 26, 1983
Filed:
Nov. 06, 1981
Holger Struthoff, Freiburg, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
A monolithic integrable R-2R resistor network comprises a number of series resistors connected to a terminal resistor; and a plurality of 2R resistor units each capable of being switched by two electronic switches either to ground or to another reference point, a different plurality of 2R resistor units being coupled to the nodes between each of the series resistors, to the node between the terminal resistor and the last resistor of the series resistors and to the node ahead of the first resistor of the series resistors. To compensate for the effects of the variations of the switch resistances caused during manufacture by process parameter fluctuations upon the accuracy of a D/A converter, a switch structure is inserted at each of the nodes which, with respect to the two electronic switches, is of the same kind, and which is permanently in an electrically conducting state. Preferably, there are used insulated-gate field-effect transistors and insulated-gate field-effect transistor structures, the identical electrodes of which, for example, the source electrodes, are directly connected to each of the nodes.