[sdiy] RMS converter schematics

[Justin Owen]

-----Original Message-----
From: Byron G. Jacquot [thescum at surfree.com]

>I'm on the lookout for some schems that will take an AC signal (or one that has been full wave rectified) and output a 'true' RMS signal.


>> There's also a schematic for one in the Sergio Franco book.  Page 620 in the edition on my shelf.  4 opamps and maybe 6 BJTs.  I've been meaning to play with it sometime.

Hi Byron,

Is the Sergio Franco book "Design with Operational Amplifiers and Analog Integrated Circuits"?

Sounds like the sort of thing I'm after as I'm looking to build it from scratch - not using dedicated RMS chips.

Thanks,

- J