Mayank
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Hi, Point taken --> If you want a low-Voltage operation,Thick Gate O2 cant be used....
Along with what Tosei suggested, check the Czarnul ckt also out -->
Z. Czarnul, "Modification of Banu-Tsividis continuous-time integrator structure," Circuits and Systems, IEEE Trans. Ckt. Syst., pp. 714- 716, July 1986.
All of these structures are aimed at reducing 2nd OR higher Harmonic Distortion.
1 more thing --> Do a quick 'rapid IP3' run on your config (the one with Diode-connected Resistive Loads) and quote the 1dB compression point....What's your acceptable spec. on it ?
Anyways,Just out of curiosity, what's your application which demands such low cut-offs ~ 0.5Hz ???
--Mayank.
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