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Re: CMFB in two stage
this opamp is going to use in a S/H circuit of pipeline adc .
which type of cmfb is suitable for me ???
will somebody give me some reference (or paper) of CMFB?
two stage cmfb
I am going to design a CMFB in two stage folded cascode differential opamp.
according to the , somebody said "we need to have two cmfb circuit in two stage."
is it correct that two cmfb circuit is needed in two stage folded cascode differential opamp?
this opamp is going to...
sample hold simulation
Hi,LvM, thanks for help.
There's a mistake in the former plot, i have corrected it already.
The S/H cirtuit I used is from a paper named ''A 1.0V 40mW 10b 100MS/s Pipeline ADC in 90nm CMOS'', with author Hirotomo Ishii, Ken Tanabe, Tetsuya Iida.
LvM suggests structure...
Hi, jerryzhao. Thanks for help.
Yes. I set the common mode voltage of differential input signal exactly equals to the Vcm of opamp, we say for example Vcm=0.45V, Vinp=0.45+0.25, Vinn=0.45-0.25.
The CMFB I use now is also kinda ideal one. Two huge resistors(1G ohms) sense the common voltage of...
Hi, FvM. Thanks for your help. I have checked Razavi's book and saw the S/H circuit you mentioned. The S/H cirtuit I used is from a paper named ''A 1.0V 40mW 10b 100MS/s Pipeline ADC in 90nm CMOS'', with author Hirotomo Ishii, Ken Tanabe, Tetsuya Iida.
I know the principle of the one from...
sample hold circuit
I designed a opamp, which is used in the basic Sampel&Hold circuit.
who can help solve this problem?
ctrl1 for Sample Phase, ctrl2 for Hold Phase
The circuit will finish the sample and hold function by switching capacitors.
There are only 2 capacitors in the SH circuits...
who can help me solve this sample hold circuit design problem???
ctrl1 for Sample Phase, ctrl2 for Hold Phase
I designed a opamp, which is used in the basic Sampel&Hold circuit.
The circuit will finish the sample and hold function by switching capacitors.
There are only 2 capacitors in the...
om-amp
help
i am doing 10 bits pipeline adc.
i have a problem about the high speed ap amp .which arch shold i choose?
1) one stage folded cascode with gain boosted?
2)two stage folded cascode OP AMP?
or something else is the best?
and could u tell me the reason for choosing this?
supply...
cadence xti parameter
I am doing hand caculation
Could u tell me how can i find the λn and λp from www.mosis.org?
I use cadence soft ware.
Added after 2 minutes:
Thank u for your help.
I am using cadence for the design.
But i can not find the parameter as your steps.
Could u paste the...
μncox 0.13um cmos
help
i am doing analog ic design using 0.13um CMOS prosess.
who can tell me the process parameters?
ex.
Vth,λn,λpµnCox,µpCox?
Thank you in advanced.
:D:D:?:
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