Constant voltage device
US11353899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2021 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Apr 13, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A constant voltage device include a diode; a switch including one terminal connected to a ground potential and another terminal connected both to an anode terminal of the diode and to a drain of a PMOS transistor having a source applied with a power source voltage; a voltage generation circuit configured to generate a voltage of a predetermined magnitude; and a differential amplifier that includes a non-inverting input terminal to which both a cathode terminal of the diode and an output terminal of the voltage generation circuit are connected, and that is configured to change a supply route of a reference voltage applied to the non-inverting input terminal according to a state of the switch. The voltage generation circuit is configured to employ an output voltage based on the reference voltage and amplified by the differential amplifier to generate the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.