Hello, I am building this circuit I found on net and it works fine. It is a full wave rectifier without diodes based on single supply opAmps, works great and I like it, however I want to add a hi-pass filter so that I can reject certain frequencies from the signal (signal is anywhere from 500Hz to 10kHz). I am not solid on what frequency to reject yet but for first build I want to remove anything below 5kHz.
I found many examples of how to implement hi-pass filter for single op-amp whether inverting on non-inverting input and it seems straight forward as shown on illustration#2 (left - inverting, right non-inverting versions) however full wave rectifier circuit I have uses both at the same time and I am not sure how to make that happen in this case, can someone push in right direction please?
In full wave rectifier circuit I am using following values for passives:
R1 = 20k
R2, R3 = 100k
Thank you.