Dec 4, 2007 #1 ehsan_r34 Member level 2 Joined Apr 1, 2007 Messages 45 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,555 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.
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.
Dec 5, 2007 #2 ehsan_r34 Member level 2 Joined Apr 1, 2007 Messages 45 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,555 1v CMFB circuit Please help me if you know any thing about that.
Dec 5, 2007 #3 Y yxo Full Member level 4 Joined Jul 13, 2007 Messages 196 Helped 26 Reputation 52 Reaction score 8 Trophy points 1,298 Location The Netherlands, Delft Activity points 2,303 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?
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?
Dec 6, 2007 #4 ehsan_r34 Member level 2 Joined Apr 1, 2007 Messages 45 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,555 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 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?
Dec 6, 2007 #5 Y yxo Full Member level 4 Joined Jul 13, 2007 Messages 196 Helped 26 Reputation 52 Reaction score 8 Trophy points 1,298 Location The Netherlands, Delft Activity points 2,303 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
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