Tan Chun Chiek wrote:
>         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?

What exactly do you want this "conversion" to DC to do?  Are you trying to
get the average DC level?  The amplitude?  Something else?


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