Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
hi guys,
In designing a 2 stage fully differential amplifier,
1) when we apply differential signal to input, the feedback is negative (designed to be so)
2) when we apply common mode signal to input, the feedback becomes positive.
Thus: a) since common mode gain is small (<1), there are no...
hi Lvw,
thanks for your notice. i found the link gives the wrong formula (lacks a coefficient).
I re-do the derivation, and gives the right formula in below
W-3dB = Wn * sqrt[1-2ζ^2+sqrt(4ζ^4-4ζ^2+2)]
where Wn is the pole frequency and ζ is the damping factor (equals 1/(2Q) )
how to calculate the cutoff frequency of seond order low pass filter mathematically?
anyone knows?
Added after 23 minutes:
to be more exact, i mean how to calculate fc (cutoff) from the transfer function, similar to the Q, Wp calculation.
Hi all,
I have a problem.
For a fully differential voltage amp , with the same input voltage magnitude as the single-ende version, we will have the same output magnitude, but twice the noise, thus SNR is 3dB lower than single-ended version.
For a fully differential transimpedance amp , with...
Re: transmission zero
i agree with you more, to make it clearer:
in case 1 you mean the zeros in jw axis, thus we get infinite attenuation.
in case 2 you mean the zeros those are NOT in jw axis, we get finite attenuation.
this is because the zeros of H(s) are zeros of H(jw) only when they are...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
