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How do I simulate the fully differential OTA?

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Sadegh.j

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check out the code attached. it works well, just change the library name. it is more of a template. Remember, you should remove the comment lines after choosing your simulation.

Good Luck
 

vipwl

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THANK,VERY HELPFUL.
 

kumar123

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Sadegh.j said:
check out the code attached. it works well, just change the library name. it is more of a template. Remember, you should remove the comment lines after choosing your simulation.

Good Luck

This kit looks very useful , but i have doubt that why is the V- is connected to 1.5 always? if this is some dc bias voltage how do we arrive on this based on desin?

which is the .print/plot corrensponds to Transient simulation with pulse input?
is this "dcgain" measurement is so called Av(0)?

it would be helpful if you tell remaining Vin (3 types) and V+ when to use (meaning measurement/print/plot )

similarly what is the setup to calculate ICMR ?

thanks a lot
 

sohpie2007

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You can start with a sample OPAMP design, you can download the free circuit at:

**broken link removed**
 

s_babayan

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You can simply refer to the Gray integrated circuit design book. Wish you good luck
 

Sadegh.j

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Pick a simulator depending on your freq. In lower freq, hspice and cadence are pretty good. In very high freq. nothing beats ADS. (I think)

The differential input could be tricky. Pay attention to the common mode level. You have to DC biase transistors after all.

Then simulate your circuit. view the bode plot and you have all you need
 

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