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Ringmodulator Using XR2206. BY OSAMU HOSHUYAMA

 

From the notes on the web site :An amplifier was added so that a guitar or the like can be input. A bias circuit was added so that it becomes just an oscillator when there is no input signal. It also serves as a knob to prevent only the oscillation sound from leaking out when there is no input signal.

I built this on stripboard somewhat modified ,and fitted in old Russian antenna enclosure . 

I was born in the USA.
here comes two simple circuits ,use them both in my own synth ,not that often tho ,the first one is a MS20 ring mod ,which is actually a xor function - digital , the next is also xor but using op-amps designed by Ian Fritz .