Multiplexed photocurrent monitoring circuit comprising current mirror circuits
US8569674B2 · kind B2 · utility
0Cited by
8References
13Claims
0Family size
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Key dates
| Filing date | Aug 21, 2007 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F30/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low cost photocurrent monitoring circuit is provided. A photocurrent monitoring circuit, which performs monitoring by converting photocurrents output from a plurality of photodiodes (PD1 to PDn) into voltage, includes: a multiplexer circuit (MUX) for selecting one of input terminals to establish a connection of the selected input terminal to an output terminal, wherein the photodiodes (PD1 to PDn) are respectively connected to the input terminals; and an amplifier (LA) for converting a photocurrent which flows from a selected photodiode via the multiplexer circuit (MUX) into a voltage, and for outputting the voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.