[sdiy] MC1495 multiplier chip discontinued completely

[Grant Richter]

> 
> I want low noise and linear behaviour (smooth sound).
> So next I try the RC4200 (?) and the 1496 with external DIY
> linearisation stage. If this doesn't work I'll go back to
> a complete discrete design, perhaps using a couple of
> japanese dual NPN, glue, expoxyd ... whatever it takes
> to cope with the offset problems...
> 

The RC4200 (which is basically a prepatched LH0094) has a rated linearity of
0.1% versus 1% for other multipliers. That should translate into lowest THD
and THD cross-products (best sideband rejection).

The white noise on the input channel is another thing, this causes carrier
feedthru, so you really need a noise gate on the "input". Or perhaps gate
the output from an Env. Fol. on the modulation input.