Explanation of the ring modulator principles

hi
it uses diodes to generate a square carrier rather than sinusouidal ones .

regards

Here's the operating/service manual for a classic old HP 10514A/B mixer. The Theory of Operation section (page 12) describes the diode ring modulator.

It's a PDF file, about 1.6 megabytes. This link will probably disappear in a few days.
http://s24.yousendit.com/d.aspx?id=2...R0SYDQ0DN8OZWV

ring mogulator uses 4 diodes just like bridge rectifier. it just operates as a switching. such that 2 diodes ON for +ve half cycle and other 2 for -ve half.

ring modulator schema