EMS VCS3 Ring Modulator - how does it work?

[Magnus Danielson]

>>>>> "SC" == Sean Costello <costello at seanet.com> writes:

 SC> Hi everybody:

Hi Sean!

 SC> Anyone know what is inside the VCS3 ring modulator?  I've never seen a
 SC> circuit.  Is it a transformer based design, or discrete transistors, or
 SC> a 1496 design, or...?

It is a design built around a TAB 101 IC which holds 4 transistors
connected together to form a Gilbert-cell. The design lacks the arctan
diodes, so it will have unlinearities as you should expect from any
other of noncompensated designs. I notice that there is some cross
feeding of input to to suppression.

In most reagards this should be similar to a 1495 design or something.
Maybe Juergen could comment on that?

Cheers,
Magnus