Reference voltage generating circuit
US5926062A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jun 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/227
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A reference voltage generating circuit includes a constant current circuit, a current mirror circuit, and a load resistor. The constant current circuit generates a constant current proportional to a thermal electromotive force. The current mirror circuit uses the constant current generated by the constant current circuit as a reference current. The load resistor converts the output current of the current mirror circuit into a voltage. The current mirror circuit is constituted by a first transistor having a collector connected to the constant current circuit, a first resistor having one terminal connected to the emitter of the first transistor, a second transistor having a base connected to the base of the first transistor and a collector connected to the load resistor, a second resistor having one terminal connected to the emitter of the second transistor, a third transistor having a base connected to the collector of the first transistor and an emitter connected to the bases of the first and second transistors, and a third resistor connecting the base and emitter of the first transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.