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:
May. 06, 2014
Filed:
Jul. 24, 2012
Stefan Marinca, Limerick City, IE;
Denis M. O'connor, Banteer, IE;
Stefan Marinca, Limerick City, IE;
Denis M. O'Connor, Banteer, IE;
Analog Devices, Inc., Norwood, MA (US);
Abstract
A system provides for a voltage reference having a small temperature coefficient spread. The voltage reference includes a PTAT voltage trimming circuit that accurately trims the CTAT voltage component of the bandgap type voltage reference. The voltage trimming circuit includes two bipolar transistors that are biased by biasing currents to create a specific base-emitter voltage difference at an output. The bias currents can be digitally trimmed by a current digital-to-analog ('DAC') converter. This may result in the ability to trim the voltage reference at a single temperature, without the need to trim at two or more temperatures.