Circuit for detecting charged voltage of electronic flash
US4630916A · kind A · utility
8Cited by
7References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 5, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Sep 5, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A voltage dividing circuit containing a switching element is connected in parallel with a main capacitor of which a highly charged voltage is applied to a flash lamp for flashing. Only when the switching element is turned on does the voltage dividing circuit produce a divided voltage. The divided voltage is compared with a reference voltage. The result of the comparison is used for detecting the charged voltage across the main capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.