Detection circuit having a variable impedance circuit
US6307196A · kind A · utility
18Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photodiode detection circuit using a transimpedance amplifier circuit is disclosed. Overload current from the photodiode is diverted away from the amplifier to a voltage supply, e.g. ground, through an overload protection diode connected in series with the photodiode. A differential structure is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.