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:
Sep. 17, 2013
Filed:
Sep. 30, 2010
John L. Melanson, Austin, TX (US);
Prashanth Drakshapalli, Austin, TX (US);
Larry L. Harris, Austin, TX (US);
John L. Melanson, Austin, TX (US);
Prashanth Drakshapalli, Austin, TX (US);
Larry L. Harris, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
An electronic reference-signal generation system includes a supply invariant bandgap reference system that generates one or more bandgap reference signals that are substantially unaffected by bulk error currents. In at least one embodiment, the bandgap reference generates a substantially invariant bandgap reference signals for a range of direct current (DC) supply voltages. Additionally, in at least one embodiment, the bandgap reference system provides substantially invariant bandgap reference signals when the supply voltage varies due to alternating current (AC) voltages. In at least one embodiment, the bandgap reference system generates a bandgap reference voltage VBG, a 'proportional to absolute temperature' (PTAT) current ('i') and a “zero dependency on absolute temperature” (ZTAT) current (“i”) that are substantially unaffected by variations in the supply voltage and unaffected by a bulk error current.