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:
Jan. 12, 2021
Filed:
Sep. 20, 2019
Nxp Usa, Inc., Austin, TX (US);
Tao Chen, Austin, TX (US);
Robert S. Jones, III, Austin, TX (US);
NXP USA, INC., Austin, TX (US);
Abstract
A circuit for high accuracy element matching is provided. The circuit includes an analog to digital converter (ADC) configured to generate an output code. A current source is configured to provide a signal to the ADC. The current source includes a first current branch including a first unit element group having a first unit element coupled by way of a first set of switches to a first node and a second node and a second unit element coupled by way of a second set of switches to the first node and the second node. A second current branch includes a second unit element group having a third unit element coupled by way of a third set of switches to the first node and the second node and a fourth unit element coupled by way of a fourth set of switches to the first node and the second node. A control circuit is configured to provide control signals to the sets of switches based on the output code. The control circuit is further configured to sort unit element currents and to dynamically switch unit elements.