[sdiy] Ring Mod (was Re: Hadamard Transform Network)

[Paul Perry]

If you take the diode curve as approximating x squared at low values,
then I think the squaring of inputs A and B comes from the identity
(A+B) squared - (A-B) squared = 4AxB

If you are using an AD633 or other multiplier & feel that the accuracy won't 
give
enough stray harmonics, just put one or both of the inputs through a 
distortion
or fuzz box. No worries!

paul perry Melbourne Australia

----- Original Message ----- 
From: "Magnus Danielson"
> Diode mixers, DBMs, can be used in linear mode and in saturated mode. 
> There is a whole bag of pros and cons. They do not "switch" in a digital 
> sense, but rather each diode represents the mixing in each quadrant. The 
> double-balanced mixer setup allows them to add or subtract as needed for 
> the forward direction to act on the quadrant the two input signals operate 
> in. In each quadrant there is a linear term and often also overtones that 
> mix. The later is used in synthesis.