This sheet is used to design the gm-C filter shown above, called a leapfrog realisation. This filter is a 5th order filter.The method I have used is to design from the filter g-coefficients, whice can be obtained from a variety of methods including a program freely available from my web page.
I have included some simulation results at the end.
The design equations are from the IEE book "design of high frequency analog filters" Y. Sun plus some lecture notes from Saska Lindfors at Aalborg university
Yellow is user input, Green is output