Self biased electrically isolated remote switch powered by an optical or acoustic coupling
US5393989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Aug 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/807
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A self biased isolated remote switch (11) for electrically isolating a switch (24) from a circuit (16). The circuit (16) is coupled to the primary side of the self biased isolated remote switch (11) while the switch is coupled to the secondary side. The secondary side does not need a power source, power is provided through non-electrical coupling from the primary side. The self biased isolated remote switch (11) comprises a first circuit (13) and a second circuit (14) both on the primary side, and a third circuit (12) on the secondary side. The first circuit (13) non-electrically couples to the third circuit (12) for providing power. The third circuit (12) non-electrically couples to the second circuit (14) for indicating when the switch (24) is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.