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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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16th Oct 2014, 10:50 am
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#1 |
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Heptode
Join Date: Nov 2004
Location: Ripon, N.Yorkshire, UK.
Posts: 782
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Germanium transistor re?
Am I right in thinking that re = 25mV/Ie (Ie in mA) for germanium transistors as well as Silicon?
I think that's true as it's based on electron characteristics but I'm not absolutely sure. Cheers Jim |
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16th Oct 2014, 12:39 pm
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#2 |
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Dekatron
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,088
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Re: Germanium transistor re?
Yes (assuming the temperature is 20°C). Silicon or germanium makes no difference. But the figure is proportional to absolute temperature.
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16th Oct 2014, 2:16 pm
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#3 |
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Heptode
Join Date: Nov 2004
Location: Ripon, N.Yorkshire, UK.
Posts: 782
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Re: Germanium transistor re?
Cheers Kalee - yes, I know there's a kT in there somewhere!
Jim |
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