Constant current circuit and reference voltage circuit
US8476967B2 · kind B2 · utility
4Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a constant current circuit and a reference voltage circuit with improved line regulation without needing a start-up circuit. The constant current circuit includes: a constant current generation circuit including NMOS transistors and a resistor; a current mirror circuit including a pair of depletion mode NMOS transistors, for allowing a current of the constant current generation circuit to flow; and a feedback circuit for maintaining constant voltages of source terminals of the pair of depletion mode NMOS transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.