More Specialty Op-Amp Circuits
Vout = K*ln(Vin/Vref)
where K is a scale factor and Vref is a normalization constant (i.e. a constant that will result in a graph area of 1.
Used when logarithmic response is desired, such as sound amplification.
Vout = -Vref*e^^(Vin/╖VT)
where e is Euler's constant, ^^ means "to the poser of", ╖ is
Provides an exponential response (i.e. the opposite to a logarithmic amplifier).
When large inductances are required, this circuit can replace bulky inductors.
Responds as if an inductor was in series with the load.
Simulates a much larger capacitance.
R3 = equivalent circuit resistance
R2 = R3
C2 = simulated capacitance