[Cryptech Tech] Alpha Avalanche Noise Block

[Basil Dolmatov]

dol@ с iPad

> 19 апр. 2015 г., в 17:05, Basil Dolmatov <dol at reedcat.net> написал(а):
> 
> 
> 
> dol@ с iPad
> 
>> 14 апр. 2015 г., в 23:21, Павел Шатов <meisterpaul1 at yandex.ru> написал(а):
>> 
>> Speaking of voltage required for avalanche effect, you should consider part-to-part parameter variation. Transistors are analog components, if you buy ten BC818 transistors, they will all have different DC current gain. Because of this, if you have 10 identical boards, they may require slightly different voltages for avalanche effect.
> 
> They _will_ require.
> So production boards with noise source should have possibility to tune parameters for given source diode. 
> We made that by putting set of resistors into design and getting necessary voltage by short cutting some of them.
Emphasizing: set of fixed precise resistors. Never use any kind of variable ones. Never use 5-10% accuracy stock resistors 
> 
> 
>> 
>> --
>> With best regards,
>> Pavel Shatov
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