how to simualte CMRR for diffrential amp?

[JVNPAVANKUMAR]

can some one please upload the file by eda4u in rapid share

Added after 8 minutes:

**broken link removed**

 

[leohart]

usually i use 2 opamps........to calculate the differential and common mode gain

Added after 41 seconds:

or much more simple,
hi arsenal

use 2 vcvs......

how to use 2 op and 2 vcvs,will you elaborate it a bit more?THX

 

[ravitest]

u give two sine waves for both postive and negative terminal , both sine waves must have a same frequency, amplitude , phase. then u plot gain in decibles. this will give common mode gain. differential mode gain minus common mode gain will give the CMRR

 

[microbasly]

the book by david is very good,I have downloaded it and many thanks!

 

[layes2]

input connect together run ac and use diff av / this av

 

[abhaykochhar2]

plot/calculation of COMMON MODE RANGE in Synopsys??

how to plot INPUT COMMMON MODE RANGE in HSPICe..
i hv read that document.. it is asking for DC + AC Analsyis...
does this avail in Synopsys tool.. help me out..

 

[williamy]

see allen book in chapter six. when simulation in monte carlo, the time is very large.

 

[johnny_cc]

how to measure the common-mode range

 

[jimboy811]

by the way, how to simulate PSRR

Added after 20 seconds:

I am using Hspice

 

[martiny3]

thanks thanks

 

[neo79]

jacob backer's coms design layout and simulation book has the exact setup on how to simulate cmrr

 

[dlinear]

does the david book discuss CMRR under monte carlo simulation? [I need more points, I downloaded the ashishsahu file first and that did not discuss monte carlo mismatch analysis at all]

 

[chenchou]

how to get some point? i can not download the tutorial!

Added after 2 minutes:

I only have 0.5 point!!

 

[udintbr]

I got a question. My diff amp design is double ended instead of single ended. How to configure the CMRR & PSRR?
Let say, for PSRR, should I use the configuration in the Allen textbook for the 1st ended output (and ignore the 2nd ended output)?

TQ

 

[heiwolf]

Oh no ideas ...

 

[wateror]

you can refer to allen's book

 

[finerain22]

How to model the common mode feedback circuit?
In some differential opamps, swtich cap CMFB is used, how to test the parameters of the ops?

 

[staric]

First, we get the differential gain. Then, we get the common gain. Final, we will caculte the CMRR=diff gain/common gain.

 

[chibijia]

i also have this problem,
i just use hspice to simulate it ,i find my cmrr is just zero in low frequency,that's why.
i use a two stage op.

 

[shao]

thanks