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. 22, 2019
Filed:
Mar. 25, 2019
Ablic Inc., Chiba-shi, Chiba, JP;
Kotaro Watanabe, Chiba, JP;
ABLIC INC., Chiba, JP;
Abstract
Provided is a power supply circuit including a series regulator step-down power circuit, a charge pump step-up power circuit, and a voltage selection circuit to which a voltage of an input terminal and a voltage of an output terminal are supplied and configured to output a higher voltage from the supplied voltages. A connection point of a first resistor and a second resistor which are connected between the output terminal and a ground terminal is connected to an input of a differential amplifier circuit. An output of the differential amplifier circuit is connected to a gate terminal of an output transistor via a first switch. An output of the voltage selection circuit is connected to the gate terminal of the output transistor via a second switch. The output of the voltage selection circuit is connected to a substrate electrode of the output transistor.