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OTA bandpass filter design

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Potomoto

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ota bandpass filter

Hi,

I need to design a OTA bandpass filter. I derive 2 equations but got 4 unknowns....

fc1 = sqrt(kn(w/L)Io1)/(2*pi*C1)
fc2 = sqrt(kn(W/L)Io2)/(2*pi*C2)

where fc1 is 4250Hz and fc2 is 17000Hz. Unknown Io1, Io2, C1 and C2.

Can give me some advise on how to do it.... Thanks in advance.

I am attaching a schematic diagram of the circuit.... seems like there is some connection error with the circuit too.... Pls help me.....

https://obrazki.elektroda.pl/1_1160021086.jpg

Regards,
Potomoto
 

erm.. how to paste the picture to the message? =p
 

2 parameters you can freely choose, and then calculate other two. in reality they will be dictated by some request i.e stability or noise...
 

If I fixed the value of C1 and then I calculate Io1 and assume Io1 = Io2, I calculate C2.... Can I do this way? But It seems that the output is not a bandpass Filter. Can pls help me look at mine circuit? Is the Connection correct?
Thanks.
 

Left circuit is used only to set dc level vo1?
 

left circuit is a high pass filter whereas right circuit is a low pass filter..
 

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