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Try a smaller step in your tran analysis. It may help.
or you can use hsim to generate a .ic volts and run hspice with initial values, because hspice is more accurate.
which part of Bandgap reference is critical for low noise application?
I built a BG reference once, the simulation results is good but the real performance is not. The output voltage varied every time, like 1mv. The temp coefficient is not a constant.
SC CMFB circuit?
Can anyone share some CMFB info. Many books, even Gray's, only give simple example.
I am confused with the phase i should use for the feedback phase & sample phase.
In my opinion, u must have a feedback to implement the 1.5X mode. Detect the power voltage dnd use PFM control to decide if u need to charge the capacitor. This might work.
adc dac architecture
Well, I agree. In the digital domain, the result will behave just like the system (matlab) simulation.
But can u give some info about the degradation in the analog parts. The filter will limit the performance.
Sinewave help needed!
First of all, u must have a negative power supply.
Then u just change the common mode voltage to 0 and amplify the sinewave u got before.
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