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Old 01-18-2017, 05:20 PM   #1
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Default Discussion: Instrumentation amp makes an accurate transimpedance amp too

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Stefano Salvatori EDN Transimpedance amplifier circuits are often used to convert photodiode current to a voltage signal. In the conventional transimpedance amplifier schematic of Figure 1, the current-to-voltage conversion factor is given by the value of the op-amp feedback resistor RF.
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Old 01-18-2017, 05:20 PM   #2
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The idea is good, but a lot of photodiodes required for normal operation of the reverse bias voltage (5 and up). In a classic transimpedance amplifier is implemented elementary. How to do this by using the instrumentation amplifier?
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Old 01-20-2017, 06:46 PM   #3
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After reading the article also asked the question. Here, the allowable voltage for the reverse bias of the photodiode is really limited by the characteristics of the specific amplifier. But the author does not say that his idea/scheme is applicable for all types of sensors.
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