Hi,=20
       I need some help on this.=20

        I have a 4Vp-p sine wave (1 to 20khz) offsetted at 3v from a =
switched capacitor filter as a bandpass filter onboard a maze navigating =
robot. It's for a few IR sensor pairs.

    How can i have this signal converted to a DC signal (0-4V) using =
LM324 opamps powered by a single rail 6V (maybe more) supply?

    I have tried many different opamp configurations but just couldn't =
get it right. Please help. Thank you!

Regards,
    Tan Chun Chiek

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