the problem is in the CM input and output ranges
My specs are:
- DC gain > 60 dB (maybe a typo... I am assuming this means the AC gain.. maybe he meant DM gain)
- unity gain bandwith > 170 MHz
- slew rate > 150 V / us
- settling time within 20ns (withing 0.4% of the final value)
- input and output swings of at least 50% of the supply full scale
- input referred RMS noise is less than 1mV
- minimum static power dissipation
Load capacitance: 1.5pF
CM input voltagle: 0.9 V
Power supply: 1.8 V
By the way, I am not sure if I am measuring the input referred RMS noise correctly. I do a "noise" analysis, plot the "equivalent input noise" and then square the line, integrate, divide by the frequency range (not sure about this), and then take a square root.
Added after 3 minutes:
And the current in the ideal current source was determined such that the slew rate specification is satisfied.