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:
Apr. 30, 2013
Filed:
Jun. 21, 2011
Hiromi Notani, Kanagawa, JP;
Hiromi Notani, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
There is provided a regulator circuit capable of increasing the capacity of the output transistor for supplying current, stably generating an internal power supply voltage and adapting to the reduction of a power supply voltage. The regulator circuit includes an output transistor which is supplied with an external power supply voltage and supplies dropped voltage to an internal circuit, a differential amplifier for outputting a gate potential applied to the gate of the output transistor, a reference voltage generating circuit for supplying a reference voltage to the differential amplifier, and a cut-off transistor for turning off the output transistor to stop supplying power to the internal circuit. The output transistor is comprised of a depression NMOS transistor whose threshold voltage is a negative voltage. The regulator circuit further includes substrate potential control means for controlling the substrate potential of the depression NMOS transistor.