Apparatus and method for sampling a phototransistor
US6222182A · kind A · utility
3Cited by
3References
19Claims
0Family size
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Key dates
| Filing date | Nov 30, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0383
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Sampling of a phototransistor in an optical encoding system is controlled by "turning on" the phototransistor, after light has already charged the base of the phototransistor at least somewhat, by applying a potential difference across the collector and emitter of the phototransistor, producing an essentially instantaneous emitter response, which is then sampled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.