Clock-referenced switching bias current generator
US6144249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1998 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jan 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A clock-referenced switching bias current source is disclosed wherein an accurate bias current is established based on the charge dissipated by a switching capacitor over a predetermined period. The time period is established by a very accurate system clock. The value of the capacitor can be accurately selected with .+-.10%. By selecting a particular capacitance and frequency, a desired average bias current value is determined according to the amount of charge dissipated over the predetermined period. In different embodiments, the bias current source can be configured to provide a bandgap current that is temperature and/or process independent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.