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Design >> Analog Design >> Gain of BiCMOS gm-cell
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Message started by blue111 on Aug 26^th, 2017, 5:36am

Title: Gain of BiCMOS gm-cell
Post by blue111 on Aug 26^th, 2017, 5:36am

1) Why Gain @ Node X must be minimized ?
2) Why Ax is equal to ratio of two gm ?

Title: Re: Gain of BiCMOS gm-cell
Post by Horror Vacui on Aug 29^th, 2017, 10:46am

First, you should ask your classmates, or teaching assistant. A real life discussion would help you more.

To be short:
-Miller effect
-because the impedance at node X is 1/gm. You could easily get this if you write the simplest small signal circuit equations.

Title: Re: Gain of BiCMOS gm-cell
Post by blue111 on Sep 2^nd, 2017, 12:15am

Thanks.

I have not thought of the Miller effect if I have not asked here.