filter transfer function simulation?

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iamxo

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what do we use to simulate 2nd order bandpass filter's transfer function?

I use ac simulation, is this ok?

I find the transfer function differs each other largely under different temp corner and power supply, is this the result of my circuit not being good enough? or other reasons?

thanks.
 

how about your architechture of you fiter? Gm-C or RC? There are all sensitive to temp, corner. You should use auto tuning circuit.
 

Hi pfd001,
How the auto tuning ckt works for making filter insensitve to temp variations
 

pfd001 said:
how about your architechture of you fiter? Gm-C or RC? There are all sensitive to temp, corner. You should use auto tuning circuit.
Click to expand...

I use Gm-C to design the bandpass filter, my simulation results always have sharp-angled point at the center frequency at different corners and temps.

I want to know what lead to this?
 

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