Photodiode circuit using a low noise artificial load resistor
US4352982A · kind A · utility
3Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1980 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Aug 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved photodector which in utilizing a low noise load network instead of a resistor has the advantages in signal-to-noise ratio of a large load resistance without the deleterious effect on response time. The circuit includes a conventional photodiode with an operational amplifier at its output. The load network is disposed in the feedback path of the operational amplifier. It consists of a second operational amplifier, a fixed resistor and a variable resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.