[SOLVED] how to design a switch capacitor filter

[jiangwp]

I want to know what is the flow about designing a switch capacitor filter.

and how to determined the parameters about different stage opamp in a SC filter on base of the Spec.

and It needs how many steps to do a SC filter.

It needs what is the EDA tools about designning a SC filter.

 

[wee_liang]

About the EDA tool, there used to be a Cadence add-on called SWITCAP a few years ago. I haven't gotten to see this add-on any more in the new Cadence version.

Perhaps you can check on Cadence website whether this tool is still supported.

 

[Vamsi Mocherla]

Well,the design starts with intended pole/zero locations. Then normalize the transfer function and then convert the transfer fucntion from s domain to z domain using bilinear transformation. Then, as per that equation, you can start doing the circuit design.

A good book to follow is Allen Holberg for this. Also, Johns and Martin also have very good info on Switcap design

 

[yuiko]

you can make first filter in continuous time and after that you can make biliniear transform