[sdiy] RMS to DC converters

Chris McDowell declareupdate at gmail.com
Wed Jan 22 17:54:57 CET 2014


Wow awesome! That is indeed exactly what I’m “tambout”. Thanks Tom! 

Chris
On Jan 22, 2014, at 10:38 AM, Tom Bugs <admin at bugbrand.co.uk> wrote:

> How do the THAT parts do it?
> Oh, wait.. seems 2252 is being discontinued.. THAT saying go with their Analog Engines (RMS Detector + VCA - some with extra opamp stages onboard too)
> Well.. anyways, THAT is a good place to lose yourself in design ideas & circuit examples - very well documented.
> Parts are available from Mouser for not too much $$
> http://thatcorp.com/THAT_IC_Products.shtml
> 
> 
> 
> On 22/01/2014 15:58, Chris McDowell wrote:
>> Thanks! I was looking at the AD8436 already, I’ll give it a try.
>> 
>> Has anyone here tried the crummier approaches? I’m not aiming for the most sophisticated or accurate compressor here, really just a circuit that compresses :) If I had a sort of crappy compressor that I could build from op amps and a 2164, I’d be a happy fellow.
>> 
>> On Jan 22, 2014, at 9:19 AM, Roman Sowa <modular at go2.pl> wrote:
>> 
>>> the easiest way and more accurate than any rectifier/filter approach can do, and besides rect/filt will give nice mean value, not RMS.
>>> LTC1967
>>> AD8436
>>> about 5-7EUR in singles
>>> 
>>> To properly convert RMS you need to square the signal, integrate and then do square root. So at least 2 multipliers and some clever circuit. Not worth the effort and much more expensive IMHO.
>>> 
>>> Roman
>>> 
>>> W dniu 2014-01-22 15:24, Chris McDowell pisze:
>>>> Hey fellas,
>>>> 
>>>> I’m looking to start playing with some compressor designs. Are any of
>>>> your familiar with an affordable RMS to DC converter IC? I’ll be
>>>> trying out some extra simple rectifier/filter solutions as well, but
>>>> figured I’d see if any of you knew more! Suggestions for other ways
>>>> to go about this are also welcome :)
>>>> 
>>>> Thanks, Chris _______________________________________________
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