Analog-to-digital converter employing constant-current circuit incorporating MISFET
US4250493A · kind A · utility
3Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Jul 18, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The constant-current circuit consists of two MISFETs connected in series and a gate bias circuit for these MISFETs. The drain voltage of the first MISFET is maintained substantially constant by the source voltage of the second MISFET. The first MISFET does not sustain the channel length modulation, because its drain voltage is substantially constant. Consequently, a constant output current is obtained through the drain of the second MISFET.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.