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Dear all,
i still have another problem in calculating stage accuracy for pipeline ADC.
i am giving out the spec of any module according to the calculating. so for any stage, including THA, residue1,residue2, i will calculate the actual output for any stage, and get all of the errors for any...
dear all, now i found a problem in design fully-differential sc amplifier used in pipeline adc:
my supply voltage is 1.2V, and all of the common-mode output of op are 0.6V to max the swing. however, from the schematic we can know that the input common-mode voltage is been setted at 0.6V, but...
pll discrete filter
hi everyone
i read a JSSC 2003 paper written by Mr.Benyong Zhang.He proposed a discrete time loop filter shown in the pic followed, it means that the icp is charging the Cs
when pfd compare the ref and div signals, and when falling down signal of ref comes , then the...
Re: Folded cascode OpAmp
i think the offset is the same as the noise, but for r2r opamp, the input pair may be nmos or pmos or both, so the offset voltage must not be linear, you can refer the followed text
good evening everyone, recently i have encountered a problem, my Integer-N FS have an excellent phase noise performance, but its spur are bad, i think if we only consider the design improvements, the ways to improve the spur are followed:
1 make the fully differential charge pump, may be the...
Generally, the two stage opamp maybe need compensation, because it has two high-impedance nodes as naalald said, and the folded cascode opamp does not , may be the book <analog design essential> written by W.Sansen will be better for you to study
you only want to test the DC gain? you can do the ac simulation accurately, pls refer to paper"determination of stability using return ratios in balanced fully differential feedback circuits"
retunn ratio
In fact, the raturn ratio method is adaptive for the feedback circuits which are very difficult to identify the feedforward and the feedback network. By the raturn ratio method you only use the formular shown in Gray's book. So the method may be not suit to understand the feedback...
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