Method and mechanism to reduce current variation in a current reference branch circuit
US7994846B2 · kind B2 · utility
2Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2009 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | May 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A feedback mechanism to reduce current variation observed in a current reference branch circuit by using body voltage control to compensate process, temperature and supply voltage variations. The current reference output voltage, which is proportional to the reference current, is sampled into a feedback loop, which controls the field effect transistor body voltage. The method and mechanism uses Corner Robust Current Reference in order to keep the design simple and diminish variation between Process Voltage Temperature (PVT) corners. This method exhibits small variation in the reference current magnitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.