Band gap reference voltage circuit
US7990130B2 · kind B2 · utility
4Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2009 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Mar 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a band gap reference voltage circuit having an improved power supply rejection ratio. Owing to a voltage supply circuit (51), a power supply voltage (V5) does not depend on variation of a power supply voltage (Vdd). A voltage (V3−V2) which is generated across a resistor (41) and has a positive temperature coefficient is determined based not on the power supply voltage (Vdd) but on the power supply voltage (V5), and hence the voltage (V3−V2) does not depend on the variation of the power supply voltage (Vdd). As a result, the power supply rejection ratio of the band gap reference voltage circuit is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.