System and method for providing a low-power self-adjusting reference current for floating supply stages
US8598935B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for providing an accurate current reference using a low-power current source is disclosed. A preferred embodiment comprises a system comprises a first section and a second section. The first section comprises a first simple current reference, an accurate current reference, and a circuit that generates a digital error signal based upon a comparison of an output of the first simple current reference and an output of the accurate current reference. The second section comprises a second simple current reference providing a second reference current, an adjustment circuit providing an adjustment current based upon the digital error signal, and a circuit biased with current equivalent to a summation of the second reference current and the adjustment current. The first simple current reference and the second simple current reference may be equivalent circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.