[time-nuts] Balanced Mixer App Note

[Magnus Danielson]

Ulrich Bangert wrote:
>> It's not real clear that building a part with monolithic 
>> diode pairs or quads buys much over a part from MiniCircuits. 
>>     
>
> Rumours are that the famous HP10514 is made from 4 discrete hand selected
> diodes. If you have thousands of diodes to select from building your own
> mixer may give sense.
>   
Well, the HP10514 does have 4 individual diodes. Selection is certainly 
being done.

Using selection for other home-built stuff is done regularly in the 
Synth-DIY world, so it is not too hard to do. Modern mixers use either 
the same die or at last dies from the same place of the wafer to 
accomplish close matching.

Cheers,
Magnus