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Which of the following characteristics is NOT desirable for the DC amplifier?
  • a)
    Low common mode rejection ratio
  • b)
    High input impedance
  • c)
    Good thermal and long term stability
  • d)
    Balanced differential inputs
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which of the following characteristics is NOT desirable for the DC amp...
An op-amp has the following characteristics:
  • Input impedance (Differential or Common-mode) = very high (ideally infinity)
  • Output impedance (open loop) = very low (Ideally zero)
  • Voltage gain = very high (ideally infinity)
  • Common-mode voltage gain = very low (ideally zero), i.e. Vout = 0 (ideally), when both the inputs are at the same voltage, i.e. (zero "offset voltage")
  • Output can change instantaneously (Infinite Slew Rate)
  • The purpose of bias current is to achieve the ideal behavior in op-amp which is high CMRR, high differential gain, and high input impedance
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Which of the following characteristics is NOT desirable for the DC amplifier?a)Low common mode rejection ratiob)High input impedancec)Good thermal and long term stabilityd)Balanced differential inputsCorrect answer is option 'A'. Can you explain this answer?
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