LIC-Instrumentation amplifier

What is an instrumentation amplifier?

• A circuit that amplifies the difference between two input signals.
• A circuit that amplifies the sum of two input signals.
• A circuit that converts analog signals to digital signals.
• A circuit that filters high frequency noise.

Which type of amplifier is an instrumentation amplifier?

• Voltage amplifier
• Current amplifier
• Power amplifier
• Audio amplifier

What is the main advantage of an instrumentation amplifier?

• High common-mode rejection ratio.
• High gain bandwidth product.
• Low input impedance.
• High output impedance.

What is the equation for the gain of an instrumentation amplifier?

• G = (1 + 2R2/R1)(1 + R4/R3)
• G = 1 + 2R2/R1
• G = (1 + R4/R3)/(1 + 2R2/R1)
• G = 1 + R4/R3

What is the typical range of gain for an instrumentation amplifier?

• 1 to 10
• 10 to 100
• 100 to 1000
• 1000 to 10000

What is the input impedance of an instrumentation amplifier?

• High
• Low
• Medium
• None of the above

What is the output impedance of an instrumentation amplifier?

• Low
• High
• Medium
• None of the above

Which of the following is a possible application of an instrumentation amplifier?

• Biomedical sensors
• Audio amplification
• Power amplification
• RF filtering

How many op-amps are used in an instrumentation amplifier?

• 3
• 1
• 2
• 4

What is the purpose of the two buffer amplifiers in an instrumentation amplifier?

• To provide high input impedance and low output impedance.
• To provide low input impedance and high output impedance.
• To amplify the input signal.
• To provide filtering of high frequency noise.