High output current buffer
US7411455B2 · kind B2 · utility
3Cited by
11References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Apr 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3076
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bipolar high output current buffer is disclosed using a negative feedback current mirror to supply the base drive to an output transistor. Small quiescent currents are used wherein the buffer demonstrates low quiescent power dissipation. The current mirror supplies the incremental base drive to the output transistor to support high output currents. When the output drive may source or sink the high output currents, two current mirrors may be used, one for each of the source and the sinking circuitry. This invention provides for minimal loss of dynamic range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.