I.sup.2 L circuitry having operating current supplied by higher-voltage circuitry fabricated on same chip
US4543499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1982 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Apr 8, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/00
Abstract
A semiconductor integrated circuit includes low voltage operation circuitries such as I.sup.2 L and high voltage operation circuitries operating at a higher voltage than the low voltage operation circuitries. Both of the low and high voltage operation circuitries are implemented in a single semiconductor chip in coexistence with each other. The low voltage operation circuitries are disposed in constant current paths in the high voltage operation circuitries so that the currents once used by the high voltage operation circuits are utilized again by the low voltage operation circuitries. Power dissipation of the whole integrated circuit is thus reduced significantly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.