High impedance output driver stage and method therefor
US5311147A · kind A · utility
1Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/56
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high impedance output driver stage (16) for reducing loading on a gain stage (18) which drives an output stage (19). The output stage (19) is responsive to an input current. A current sense circuit (21) senses current of output stage (19). The current sense circuit (21) outputs a current proportional to the current sensed in the output stage (19). A current source circuit (22) is responsive to the current output by the current sense circuit (21) and outputs a current substantially equal to the input current of the output stage (19) thereby reducing loading on the gain stage (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.