Rugged crosspoints for communication systems
US4128742A · kind A · utility
4Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Aug 15, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/521
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A bilateral solid-state crosspoint for use in a telecommunications switching network is disclosed comprising a pair of Darlington connected pairs of transistors connected in a complementary relationship. The transmission path in each direction through the crosspoint comprises a Darlington connected pair of transistors and one additional semiconductor junction. A control circuit provides base drive to the transistors to close the crosspoint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.