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What is log and antilog amplifier?
Advertisements. The electronic circuits which perform the mathematical operations such as logarithm and anti-logarithm (exponential) with an amplification are called as Logarithmic amplifier and Anti-Logarithmic amplifier respectively.
What are antilog amplifiers?
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. Basically two circuits are there to perform the anti-logarithmic function.
What is the use of log amplifier?
In general, the principal application of log amps is to measure signal strength, as opposed to detecting signal content. The log amp’s output signal, which can represent a many-decade dynamic range of high-frequency input signal amplitudes by a relatively narrow range, is typically used to regulate gain.
What is the output of log 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 are the functions of a log and Antilog Amplifier?
The operational amplifier circuit configurations which can perform mathematical operations such as log and antilog (exponential), including an amplification of the input signal provided to the circuit, are known as Logarithmic amplifier and Antilogarithmic amplifier respectively.
How does an op amp based anti logarithmic amplifier work?
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. The circuit diagram of an op-amp based anti-logarithmic amplifier is shown in the following figure −
Which is an example of a logarithm amplifier?
A more advanced one utilize bipolar transistors to remove I s in the logarithmic term. In this type of logarithm amplifier configuration, the output voltage is given as: Log amplifier is used for mathematical applications and also in different devices as per their need. Some of the applications of the log amplifier are as follows:
How is an Antilog Amplifier created in a PN junction?
The antilog amplifier is created by linking the transistor or diode at input according to the below-given configuration. The exponential formula is also applicable to the base-emitter pn junction. The output voltage is found through the current or feedback resistance. The features of this equation is given as.