filter transfer function simulation?

[iamxo]

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.

 

[pfd001]

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

 

[rampat]

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

 

[iamxo]

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

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?