LIC-Logarithmic amplifier

A logarithmic amplifier is a type of amplifier that produces an output voltage proportional to the __________ of its input voltage.

• A. square
• B. cube
• C. square root
• D. logarithm

The most common application of a logarithmic amplifier is in __________.

• A. audio processing
• B. power supplies
• C. voltage regulation
• D. signal compression

Which of the following is an advantage of using a logarithmic amplifier?

• A. High gain bandwidth product
• B. Linear input-output response
• C. Low power consumption
• D. Wide dynamic range

A typical logarithmic amplifier circuit uses a __________ diode to achieve a logarithmic transfer characteristic.

• A. Zener
• B. Schottky
• C. Varactor
• D. Silicon

In a logarithmic amplifier, the input signal is applied to the __________.

• A. inverting input
• B. non-inverting input
• C. summing junction
• D. differential amplifier

The gain of a logarithmic amplifier __________ as the input voltage increases.

• A. decreases exponentially
• B. increases exponentially
• C. remains constant
• D. varies linearly

A logarithmic amplifier is also known as a __________.

• A. anti-log amplifier
• B. exponential amplifier
• C. inverse amplifier
• D. log-antilog converter

The transfer function of a logarithmic amplifier is given by __________.

• A. Vout = k ln(Vin)
• B. Vout = k Vin^2
• C. Vout = k sqrt(Vin)
• D. Vout = k e^(Vin)

A common method for calibrating a logarithmic amplifier is to apply a __________ input signal and adjust the gain until the output is __________.

• A. linear, linear
• B. logarithmic, logarithmic
• C. exponential, exponential
• D. sinusoidal, sinusoidal

Which of the following is a disadvantage of using a logarithmic amplifier?

• A. Nonlinear input-output response
• B. High power consumption
• C. Limited bandwidth
• D. Poor noise performance