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[Paul Perry]

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