Bypass circuits for improving the response of electric shutters
US4059835A · kind A · utility
2Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1975 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Jul 25, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electric shutter circuit employs a photodiode which forms the collector load of a logarithmic amplifier. The photodiode is shunted with an active device which is caused to conduct during shutter operation to supply an additional current to the logarithmic amplifier to permit a rapid shutter response by assuring the rapid discharge of a memory storage capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.