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If Channel Length Modulation is present and gm is the transconductance of M1, what happens to the output resistance of for a fixed V2 in the following circuit?
  • a)
    (1 + (gm * ro)) * Rs + ro
  • b)
    (1 + (gm * ro)) * ro + Rs
  • c)
    (ro + 2) * Rs
  • d)
    (1 + (gm * ro)) * Rs
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If Channel Length Modulation is present and gm is the transconductance...
By performing a small signal analysis of the following circuit, we find that the output impedance of the circuit is simply (1 + (gm * ro)) * Rs + ro. For doing this analysis, we have to short V1 and V2 to ground. Thereafter, we place a voltage source at the input node and measure current. The impedance measured will be the output impedance which is (1 + (gm * ro)) * Rs + ro.
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If Channel Length Modulation is present and gm is the transconductance of M1, what happens to the output resistance of for a fixed V2 in the following circuit?a)(1 + (gm * ro)) * Rs + rob)(1 + (gm * ro)) * ro + Rsc)(ro + 2) * Rsd)(1 + (gm * ro)) * RsCorrect answer is option 'A'. Can you explain this answer?
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