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Help me design a 1v CMFB circuit

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ehsan_r34

ehsan_r34

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Hi,

I want to design an OTA in 1 volt.It must work in subthreshold region with I(vdd)<100nA .

My problem is design of it,s common mode feedback that work at 1volt.

Please help me.
 

1v CMFB circuit

Please help me if you know any thing about that.
 

Re: 1v CMFB circuit

ehsan_r34 said:
Hi,

I want to design an OTA in 1 volt.It must work in subthreshold region with I(vdd)<100nA .

My problem is design of it,s common mode feedback that work at 1volt.
Click to expand...

Really, you havn't other problem in 1v OTA amplifier?
What problems in CMFB?
 

1v CMFB circuit

My problem is it,s stability. How can i test it? and What is my considerations in my design for stability.

Do you Have any simple structure (or full designed) for CMFB design in subthreshold?
 

1v CMFB circuit

There are many topics in this forum about testing stability of CMFB. You must use search. For example break feedback and give the ac signal. Look at the output of amplifier for phase and gain. Or use stb analys in Spectre
 

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