Power supply circuit and semiconductor device
US9152159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2014 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Apr 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An output transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the output transistor; an anti-overshoot circuit coupled to the output terminal and controlled by the second error signal; an output transistor control part configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and a sensitivity adjustment part configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.