A photo diode which is reverse biased. Point B i. When the light is focused on the reverse biased photodiode, a photocurrent Ix starts flowing it is proportional to the intensity of light falling on photodiode as shown. This cunent acts as the input current to the I-V converter. Hence the output voltage proportional to photocurrent is produced. This site uses Akismet to reduce spam.
Learn how your comment data is processed. Skip to content. Name required. Email required. Abhishek Singh. Leave a Reply Cancel reply. Because the feedback voltage across R 1 applied Non-inverting terminal depends on the output current i 0 and is in series with the input difference voltage V id.
Voltage to current converter with Grounded load :. This is the other type V — I converter, in which one terminal of the load is connected to ground. For the circuit analysis , we have to first determine the voltage , V IN and then the relationship or the connection between the input voltage and load current can be achieved. A current to voltage converter will produce a voltage proportional to the given current. This circuit is required if your measuring instrument is capable only of measuring voltages and you need to measure the current output.
Sensitivity of the I — V converter :. Hence the gain of this converter is equal to -RF. The magnitude of the gain i. By keeping RF variable, it is possible to vary the sensitivity as per the requirements. One of the most common use of the current to voltage converter is Digital to analog Converter DAC Sensing current through Photodetector such as photocell, photodiodes and photovoltaic cells. Photoconductive devices produce a current that is proportional to an incident energy or light i.
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