Constant voltage outputting circuit
US7276961B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2005 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | May 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/565
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A constant voltage outputting circuit has a differential amplification circuit having two inputs and an output that is connected to a gate of an output transistor. The output transistor is connected between a power supply voltage and an output terminal and controls an output voltage at the output terminal based on an output of the differential amplification circuit. A voltage division resistor divides the output voltage and applies a divided voltage to one input of the differential amplification circuit, and a reference voltage is applied to the other input thereof. A capacitor connected between the power supply voltage and the gate of the output transistor stabilizes the output voltage when the power supply voltage changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.