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I have a question about op amp. for band pass filter

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surno

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Hi, all~

I'm designing op amp for active RC band pass filter at 40MHz.
I get a specification of op amp to do a filter modeling. The specification of op amp is like that :
- unity gain freq. is more than 5GHz when load cap is 0.5pF
- dc gain is needed 60dB
- maximum power dissipation is 500uW(vdd=1.2V).

Is it possible at CMOS process?
 

surno

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I think, it is impossible~
 

analog_prodigy

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Hi,
for me, i got maximum of 160MHz bandwidth.
it may be possible and depends on basically your input transistor gm value and load capacitance. by decreasing load cap still more, i think you can achieve.
 

surno

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Hi nalog_prodigy

My final destination is 40MHz band pass filter. To make a 40MHz band pass filter, first of all I design an 5GHz op amp. I know that bandwidth releated input Tr gm and gm is related with current consumption.

Then, how do you design 5GHz amp maximum current 0.5mA. I think it is impossible.
 

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