Merged differential amplifier and current source
US5115206A · kind A · utility
7Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Nov 8, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45612
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The tail current of a differential transistor pair (12 and 14) is controlled by a feed-back means (40) that couples the pair's tail node (16) to the control input of each transistor for controlling a biasing current through each transistor. The control input of each transistor further receives an input signal in addition to an output signal of the feed-back means. As a result, the circuit has a stable and accurate tail current, and in addition is suitable for a low-voltage supply or for high-current operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.