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How fast can germanium transistors compute ? And how much current will that draw ?

Yann Guidon / YGDESYann Guidon / YGDES 09/20/2016 at 02:440 Comments

Things are getting out of hand !

Ref
hFE
Ft
(MHz)
I
(mA)
U
(V)
P
(mW)
FabQty
KF167
NPN?
250 ?



Tesla ?
siicon ?
300?
G106TPNP6035
2560Telefunken300
AF137
PNP6035
2560Telefunken300
AF138PNP60...10040
2560Telefunken1000
AF178PNP>20180102575Philips100
AF200PNP>302001025225
(??)
Siemens600
AF240PNP25500101560Siemens10000

The G106T and AF137 are pretty much the same (same manufacturer, same characteristics...) and just a tiny bit slower than the AF138.

AF200 is quite faster but the power rating I have found feels inaccurate. The package is a classic-looking metal can, much smaller than the TO-5 of the AF178 rated at 75mW. In comparison, the slower AF13x are in the funny-looking "long can" TO-18 package.

Anyway, I have two sorts of transistors :

In the context of a bitslice, the fast transistors would be used for the adder's carry chain, while the slower would do the rest. Since they have a higher gain, they could be tuned to consume less current and save some energy (which will translate into less drift during operation ?)

Anyway, I can already imagine implementing one bitslice with each one of these references and see how the Ft (transition frequency) translates into raw operating speed.

...

Oh wait, today it seems I can get a ridiculous amount of AF240...


2020 : Jaromir sent me his stock of eastern germanium and this is getting crazy :-D
However the inventory is not easy...

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