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:
Oct. 31, 2017
Filed:
May. 15, 2015
Dialog Semiconductor (Uk) Limited, Reading, GB;
Cang Ji, Kirchheim unter Teck, DE;
Siarhei Meliukh, Munich, DE;
Dialog Semiconductor (UK) Limited, Reading, GB;
Abstract
A method and circuit for trimming a bandgap reference are described. The bandgap reference circuit comprises a first diode which is arranged in series with a first resistor between a reference point and a reference potential V. The circuit also comprises a second diode which is arranged in series with a second resistor and a third resistor between the reference point and the reference potential V. In addition, the bandgap reference circuit comprises a trimming network, wherein a bandgap reference voltage Vis provided at a midpoint between the trimming network and the current source. The circuit also comprises an operational amplifier. The method () comprises measuring a first diode voltage across a replica element of the first diode; determining a first resistance of a replica element of the first resistor; and setting a resistance of the trimming network using the first diode voltage and the first resistance.