What is the role of a diode in logarithmic amplifier?
LOG AMP ARCHITECTURES The voltage across a silicon diode is proportional to the logarithm of the current through it. If a diode is placed in the feedback path of an inverting op-amp, the output voltage will be proportional to the log of the input current as shown in Figure 6.
What is an antilog amplifier draw the circuit of an antilog amplifier?
AntiLog amplifier or anti–logarithmic amplifier is an electronic circuit that produces output that is proportional to the anti-logarithm of the applied input. Basically it performs mathematical operation of an anti-logarithm.
What is meant by logarithmic amplifier?
Log amplifier is a linear circuit in which the output voltage will be a constant times the natural logarithm of the input. The basic output equation of a log amplifier is v Vout = K ln (Vin/Vref); where Vref is the constant of normalisation, and K is the scale factor.
What is the disadvantage of log antilog amplifier?
What is the disadvantage of log-antilog multiplier? Explanation: Log amplifier requires the input and reference voltage to be of the same polarity. This restricts log-antilog multiplier to one quadrant operation. 4.
What is Antilog amplifier?
An anti-logarithmic amplifier, or an anti-log amplifier, is an electronic circuit that produces an output that is proportional to the anti-logarithm of the applied input.
What is exponential amplifier?
Anti-Logarithmic Amplifier or Exponential Amplifier Anti-logarithmic or exponential amplifier (or simply antilog amplifier) is an op-amp circuit configuration, whose output is proportional to the exponential value or anti-log value of the input. Antilog amplifier does the exact opposite of a log amplifier.
How op-amp can be used as an antilog amplifier?
An op-amp based anti-logarithmic amplifier produces a voltage at the output, which is proportional to the anti-logarithm of the voltage that is applied to the diode connected to its inverting terminal. In the circuit shown above, the non-inverting input terminal of the op-amp is connected to ground.