Photodiode Question

Jim Thompson · 2010-03-22T03:10:52+00:00

What current would one expect to see from a photodiode exposed totypical bright room light (used to control a backlight proportional toroom light)?As usual, my customer has no clue. My only concern, design wise, isto build a micropower transconductance amplifier with sufficientoutput drive to handle the maximum available photo current. ...Jim Thompson-- | James E.Thompson, CTO | mens || Analog Innovations, Inc. | et || Analog/Mixed-Signal ASIC's and Discrete Systems | manus || Phoenix, Arizona 85048 Skype: Contacts Only | || Voice:(480)460-2350 Fax: Available upon request | Brass Rat || E-mail Icon at | 1962 | I love to cook with wine. Sometimes I even put it in the food.

Mar 22, 2010 61 Replies

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Oppie 16 years ago

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Last time I worked with them was about 25 years ago. It was used as a oscillator/ramp generator for a proportional heating control system in a 'Centrifichem' blood chemistry analyzer. Oppie

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George Herold 16 years ago

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The noise temperature of a FET opamp looking at say a 1 Meg or 10 Meg resistor can be truly tiny. (I guess noise temperatures only really make sense if you stick to a fixed input impedance.)

George H.

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