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:
Jun. 09, 2015
Filed:
Mar. 08, 2013
Applicant:
Dialog Semiconductor Gmbh, Kirchheim/Teck-Nabern, DE;
Inventors:
Ambreesh Bhattad, Swindon, GB;
Stephan Drebinger, Munich, DE;
Assignee:
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/30 (2006.01); G05F 1/46 (2006.01); G05F 1/56 (2006.01); G05F 3/26 (2006.01);
U.S. Cl.
CPC ...
G05F 1/46 (2013.01); G05F 1/56 (2013.01); G05F 3/262 (2013.01); H03F 1/30 (2013.01);
Abstract
Circuits and methods to control current through a device biasing an output device in case the supply voltage is not higher than the output voltage are disclosed. The circuits and methods are applicable to e.g. LDOs, amplifiers, or buffers. A control loop detects if the supply voltage is not higher than the output voltage and regulates the drain-source voltage of the biasing device. The disclosure reduces power consumption in a driver stage in case the supply voltage is not higher than the output voltage.