Photocoupler capable of effecting phase control with an embedded junction capacitor
US5559340A · kind A · utility
5Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Apr 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/795
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A photocoupler includes: a first chip formed with a light emitting element emitting light in response to an input current; and a second chip formed with a light receiving element outputting a current having a magnitude in association with the intensity of the light from the light emitting element, a capacitor formed of a PN-junction for storing charges from the output current from the light receiving element, and a Darlington circuit having the capacitor interposed between the base and emitter thereof, The first and second chips are sealed to form a single photocoupler which is capable of solely effecting phase control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.