AM Demodulator

Hi everyone

I have just arrived here - it's nice here!

I was wondering if anyone could help me in finding a cheap AM Demodulator IC which can operate down to DC frequency (the modulating wave). I want to measure the envelope of a sound wave which may be the same intensity for several minutes at a time. Also if I can use it single-sided that would help too.

I've tried making my own envelope detector circuit which sort of works, but not very well.

Thanks to anyone who can shed some light 8)

Dave

One AM IC that I know is ZN414. Here is the datasheet: https://www.electro-tech-online.com/custompdfs/2003/07/ZN414484PDF.pdf

Ok I found equivalent of ZN414. It is MK84. Datasheet:
**broken link removed**