[Cryptech Tech] Alpha Avalanche Noise Block

[Павел Шатов]

On 22.04.2015 9:18, Basil Dolmatov wrote:
> Not the end users, but board manufacturers.

This will require ordering tuning services from board manufacturer after 
assembly. Can't we follow Benedikt's suggestion and use increased supply 
voltage instead?

--
With best regards,
Pavel Shatov


> dol@ с iPad
>
>> 20 апр. 2015 г., в 22:12, Павел Шатов <meisterpaul1 at yandex.ru> написал(а):
>>
>>> On 19.04.2015 18:05, Basil Dolmatov wrote:
>>>
>>>> 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.
>>
>> How are end users supposed to figure out what resistors to short?
>>