Question

Draw the circuit of antilogarithmic amplifier using an op-amp and obtain the expression for its output voltage. 

19 Jan 2026
Answer :
Word Count : 297
An antilogarithmic amplifier can be constructed using an operational amplifier (op-amp) with a diode or a transistor in the feedback path. The key idea is to exploit the exponential current-voltage relationship of a diode or BJT to produce an output voltage proportional to the antilogarithm of the input voltage. Circuit Description: 1. Use an op-amp in an inverting configuration. 2. Connect the input voltage (V_\text{in}) to the inverting input through a resistor (R). 3.
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