1S34 diode

[jlo]

I'm trying to find some info on the 1S34 diode.  I believe its germanium.  I have a couple but I don't have a means to test the forward voltage.  Anyone know?   

Thx!

[antonis]

1S34

1S75

AA117

[m4268588]

I don't know if I own Toshiba's products. And it's just one sample.

[Rob Strand]

Post with some germanium measurements with tabulated data:
https://www.diystompboxes.com/smfforum/index.php?topic=117550.msg1126227#msg1126227

Some plots from early datasheets:
https://www.diystompboxes.com/smfforum/index.php?topic=117550.msg1126232#msg1126232

[antonis]

Interesting enough..

Considering all diodes obey to Schokley equation, what counts in current ten-fold proportionality is I_S (reverse bias saturation current) order of magnitude..
(it should be good to know for what forward bias current Ge & Si voltage drops are equal..)

[Rob Strand]

Considering all diodes obey to Schokley equation, what counts in current ten-fold proportionality is I_S (reverse bias saturation current) order of magnitude.

The Is term in the Schottky diode equation isn't constant.   

This classic paper fills in a lot of the missing details. Mainly equations (1) to (5).
https://xdevs.com/doc/_Metrology/tsividis1980.pdf

Spice knows about the T^3 term in equation (3).

If you try to derive the VBE or VD temperature coefficient for a transistor or diode you need all those details to get the well known -2mV/deg C.