ETC EngineeringMCQs
Home

Signal Conditioning MCQs

Practice Signal Conditioning MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Measurements & InstrumentationSignal Conditioning

An instrumentation amplifier is especially useful for sensor signals because it typically provides?

  • AHigh input impedance and high common-mode rejection
  • BVery low input impedance and zero gain
  • COnly digital output
  • DNo differential amplification
Report an error
Correct Answer: A. High input impedance and high common-mode rejection
Explanation: Instrumentation amplifiers are designed for accurate amplification of small differential signals in the presence of common-mode voltage.
Reference: Standard measurements and instrumentation: signal conditioning
Question 2
Measurements & InstrumentationSignal Conditioning

Common-mode rejection ratio of an instrumentation amplifier is the ratio of?

  • ADifferential gain to common-mode gain
  • BCommon-mode gain to differential gain
  • COutput resistance to input resistance
  • DBandwidth to gain
Report an error
Correct Answer: A. Differential gain to common-mode gain
Explanation: CMRR=Ad/Acm and indicates how strongly the amplifier rejects signals common to both inputs.
Reference: Standard measurements and instrumentation: signal conditioning
Question 4
Measurements & InstrumentationSignal Conditioning

A CMRR of 10000 expressed in decibels is?

  • A40 dB
  • B60 dB
  • C80 dB
  • D100 dB
Report an error
Correct Answer: C. 80 dB
Explanation: CMRR(dB)=20log10(10000)=20×4=80 dB.
Reference: Standard measurements and instrumentation: signal conditioning