Power supply circuit
US10454376B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2019 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Mar 25, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.