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. The sensitivity of the above circuit can be increased by increasing the feedback resistance.
Thus the feedback loop is modified with a resistive 'T' section as shown below. The input current Iin is allowed to flow through the resistance R; because input current to op-amp is zero. Assume the voltage 'V' as shown in diagram above. The input current divides at node 'V' to have currents I1 and I2 as shown. Applications of current to voltage Converters: 1 Photodiode Current measurement: One of the major applications of current to voltage converter is photo detector amplifier as shown below.
The photodiode is operated in reverse bias condition. The voltage 'V' is applied to it. This current is input current to the circuit and is calculated as given in equation above.
In dark condition, the resistance is very large. As the intensity of light incident on photodiode is increased, the resistance decreases as shown in graph below. As mentioned in above application, first the output voltage is measured on DMM.
It is also called as current scaler. As shown in the figure, the input applied is a current source Iin. The non-inverting terminal is kept at ground potential. A resistive 'T' section is formed in the feedback path as shown in figure above. Due to virtual ground concept, the inverting terminal appears to be at ground potenstial.
Consider the potential 'V' as shown in the figure. Ac dc power converters single phase full wave controlled rectifier single phase half wave controlled rectifier three phase full wave controlled rectifier three phase half controlled rectifier.
Amplifier instrumentation amplifier inverting amplifier isolation amplifier non inverting amplifier operational amplifier unity gain buffer.
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