Ring mod math

[John Speth]

You should download Analog Devices' AD633 datasheet from their web site.  It does a good job of covering the basics of using a multiplier chip for square rooters, multipliers, etc.

John Speth
Object Engineering, Inc.
johns at oei.com

-----Original Message-----
From:	Paul Perry [SMTP:pfperry at melbpc.org.au]
Sent:	Wednesday, December 03, 1997 12:52 AM
To:	synth-diy at mailhost.bpa.nl
Subject:	

Here's one for the maths people:
A ring modulator (multiplier chip) with identical sine waves at
the 2 inputs produces a sine wave at double the frequency.
Now I assume it is possible to put a squarer (ie multiplier with tied
inputs) in a feedback loop to give a square rooter... but what would the
output look like? A sine wave at half the frequency? And what happens
with a less simple input, eg a signal consisting of two sine waves at
different frequencies?

paul perry melbourne australia