Multiplexed photocurrent monitoring circuit comprising current mirror circuits

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...

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Bibliographische Detailangaben
Hauptverfasser:	TANIGAWA HISANOBU, GOH TAKASHI, SAITO RYOSUKE, KASAHARA RYOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AMPLIFIERS BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY COLORIMETRY ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS RADIATION PYROMETRY SEMICONDUCTOR DEVICES TESTING
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Beschreibung
Zusammenfassung:	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.