Op-Amp Log Amplifier

Last modified by

on

Jul 24, 2020, 6:28:07 PM

Created by

on

Jul 11, 2016, 2:19:20 PM

V_{out} = - V_{T} \cdot \ln (\frac{V_{in}}{I_{S} \cdot R})

$V_"out" = -V_T*ln( V_"in" /( I_S * R ))$

(T) Temperature

$(T)"Temperature"$

(V_{in}) Input voltage

$(V_"in")"Input voltage"$

(I_{S}) saturation current

$(I_S)"saturation current"$

(R) Resistance

$(R)"Resistance"$

References

The formula, definition, and image are from Wikipedia (https://en.wikipedia.org/wiki/Log_amplifier).

This equation, Op-Amp Log Amplifier, references 2 pages

• Boltzmann constant (J/K) by MichaelBartmess

• elementary charge by Carol

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Op-Amp_Logarithmic_Amplifier.png

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