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:
Aug. 13, 2019
Filed:
Oct. 29, 2018
Applicant:
Synaptics Incorporated, San Jose, CA (US);
Inventor:
Yasuhiko Sone, Tokyo, JP;
Assignee:
SYNAPTICS INCORPORATED, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 3/26 (2006.01); G05F 3/24 (2006.01); G05F 3/22 (2006.01);
U.S. Cl.
CPC ...
G05F 3/267 (2013.01); G05F 3/225 (2013.01); G05F 3/245 (2013.01);
Abstract
Bandgap reference circuitry comprises a first current mirror connected to a power supply line and configured to supply a first current to a first node and a second current to a second node virtually-shorted to the first node, a first pn junction element between the first node and a ground line; a first variable resistor element between the second node and the ground line, and a second pn junction element connected in series to the first variable resistor element. The first variable resistor element has a resistance dependent on a power supply voltage supplied to the power supply line.