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Why the two circuits have equal output impedance? (Read 3529 times)

baab Senior Member Offline Posts: 178 EA	Why the two circuits have equal output impedance? Oct 05^th, 2013, 8:37pm Hi, I am reading about noise in Design of Analog CMOS Integrated Circuits [Behzad Razavi]. Please help me with this question. Thank you.
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baab Senior Member Offline Posts: 178 EA	Re: Why the two circuits have equal output impedance? Reply #1 - Oct 5^th, 2013, 8:38pm Sorry for the post. I can't attach more than one image in a post. Please ignore this post.
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raja.cedt

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Re: Why the two circuits have equal output impedance?
Reply #2 - Oct 6^th, 2013, 3:58am

Dear Baab,
those two are similar circuit with noise current souse in one case and noise voltage source in one case. Otherwise open the current source and short the voltage source.

My sincere advice, for noise razavi book little bit confusing and complicated, so better you derive all for first time learning.

.....Raj.

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baab

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Re: Why the two circuits have equal output impedance?
Reply #3 - Oct 6^th, 2013, 4:50am

Thank you, Raj. :)

Quote:

My sincere advice, for noise razavi book little bit confusing and complicated, so better you derive all for first time learning.

Sorry for asking this, because of my limited knowledge English. I am not sure what you mean "derive" here.
Did you mean that I should derive all formulas and proofs it myself to get a comprehensive understanding?

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