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:
Mar. 27, 2012
Filed:
Jun. 03, 2009
Hans Martin Von Staudt, Abingdon, GB;
Rolf Hülβ, Hockenheim, DE;
Michael Keller, Heidelberg, DE;
Helmut Burkhardt, Heidelberg, DE;
Hans Martin von Staudt, Abingdon, GB;
Rolf Hülβ, Hockenheim, DE;
Michael Keller, Heidelberg, DE;
Helmut Burkhardt, Heidelberg, DE;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
A self-trim circuit provides a technique to trim a CUT (circuit under trim) using a LSB offset to determine the best digital value to trim the CUT. The self-trim circuit is also used to self-test the digital and analog portions of the self-trim circuitry, whereby the existence of a digital stuck at fault condition is detected. A state machine controls a digital stack to couple digital trim data to the CUT and read the output of a comparator circuit that signifies when a proper digital trim value has been used. Thereafter the proper digital trim value is stored into a nonvolatile memory.