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:
Dec. 29, 1992
Filed:
Jun. 19, 1990
Applicant:
Inventors:
Kevin M Kattmann, Greensboro, NC (US);
Jeffrey G Barrow, Oak Ridge, NC (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341159 ;
Abstract
An integrated-circuit A-to-D converter having repetitive cells which are designed to be matched, but which are subject to uncontrolled mismatches adversely affecting performance. In the disclosed embodiment, the cells all include resistors (of equal ohmic value) carrying currents (designed to be of equal value) producing corresponding output signals. To avoid the effects of cell mismatch on the output signals, a network of equal-valued resistors is added to the circuit, with each network resistor connected between corresponding ends of adjacent pairs of the cell resistors.