Скачать или смотреть What is a Log Amplifier? | Logarithmic Amplification with Op-Amp

Understand the concept of Log Amplifier (Logarithmic Amplifier) in the simplest way!

A log amplifier is an electronic circuit in which the output voltage is proportional to the logarithm of the input voltage.
This circuit uses an operational amplifier, diode, and resistor to achieve logarithmic behavior.
It has high input resistance and very low output impedance, making it useful in many electronics applications.

🔹 Why diode is used?
It provides the logarithmic feedback required for the circuit.

🔹 Want an antilog amplifier?
Just replace the diode with a resistor for exponential behavior.

The V–I characteristics of the diode give a straight-line graph with slope 2.303 KT/q, forming the basis of log amplification.

Perfect for Electronics, Physics, and Engineering students.

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Output voltage is proportional to the logarithm of the applied input voltage.
To design the circuit of log amplifier opamps, diode, resistor are used.


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