Miller Compensated OP Amp

430

04:38:36

Needs to be ran on spice, this should have a gain of 69dB .

published 10 years ago

hurz

10 years ago

I see about ~73dB single ended

voscar92

10 years ago

How are you setting up your test bench. I normally would use spice but I can only use it at school. Could you modify my design and show me how your getting 73 dB, I really would appreciate it?

hurz

10 years ago

EC sets 1Vpeak to 0dB. You got 13dB with symmetric 1mV. 1mV is to 1V 60dB plus what EC shows 13.3dB is together 73.3dB. Hope this helps.

hurz

10 years ago

http://everycircuit.com/circuit/6007168326172672

voscar92

10 years ago

Cool thanks, my minimum spec was 65dB. Going to cascode the second stage and add a transistor next to the compensation capacitor. I need more a lot more bandwidth and higher gain would be nice.

hurz

10 years ago

You are welcome! BTW, 2.5V supply voltage is quite novel. I would recommand a higher supply, cuz you are loosing already more than 500mV with every mos stage in chain, so there will be not much headroom... Keep it up!

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