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opamp selection in active RC filter

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forvictory

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hi all,
I want to design an active RC filter, opamp (GBW larger than 100MHz with PM no less than 60 degree) need to drive large capacitor (as large as 10pf) and small resistor( minimum value is 3k ohm ) ,.
classical two stage opamp with miller compansation is OK ,however it consumes too much power. so is there any better solution ?
thank you.
 

If the power consumption is your main issue, I'd try a telescopic op-amp.
If the telescopic op-amp doesn't make it, I'd try a folded-cascode op-amp.
 

JoannesPaulus said:
If the power consumption is your main issue, I'd try a telescopic op-amp.
If the telescopic op-amp doesn't make it, I'd try a folded-cascode op-amp.
Click to expand...

Iwant a constant GBW at all corner ,so can folded-cascode op-amp do it ?
 

Hi fgorvoctory,

which order and corner frequency do you require?
An extraordinary low power consumption can be achieved with filters in the log domain (weak inversion operation).
 

LvW said:
Hi fgorvoctory,

which order and corner frequency do you require?
An extraordinary low power consumption can be achieved with filters in the log domain (weak inversion operation).
Click to expand...

what i want to dasign is a chebyshev 6th oder LPF. the schema of automatic frquency callibration require the opamp has a constant GBW ,which is about 120MHz .
 

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