I am considering the design of an analog tacking filter as part of a lock-in amplifier design. Specified range would be ~5 Hz to ~120 kHz in both low pass and high pass configurations.

I have some information on a very abstract transfer functions which would probably require a DSP controller. I would like to find an analog implementation.

 

One possible approach -

https://community.cypress.com/thread/15988


Regards, Dana.