Hybrid circuit having current source controlled by a comparator
US6380794B1 · kind B1 · utility
3Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0866
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current mode logic circuit having npn transistors coupled to an NMOS current source provides a substantially constant current when controlled by an opamp comparator. A gate of the NMOS current source is directly coupled to an output terminal of the opamp. A source of the NMOS transistor is connected to one of the inputs of the comparator opamp. Another input terminal is connected to voltage source. The opamp compares the two inputs and provides an output signal which ensures that the opamp will provide a substantially constant current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.