Perhaps I am reading the graph wrong but the reistance is still greater than zero, the trend is that the resistance reduces very slightly with increasing voltage.
I think there are cases of negagitive resistance in theoretical applications, the standard unit of negative resistance is the "Mho"
(that may be a joke at my expense when I was an apprentice, I have never encountered it personally)
I think there are cases of negagitive resistance in theoretical applications, the standard unit of negative resistance is the "Mho"
(that may be a joke at my expense when I was an apprentice, I have never encountered it personally)
Hi
A number of phenomena can cause a negative resitance; but generally, it's the other variety, ie an increase in current causing a decrease of the voltage across the device (avalanche+injection, diacs, etc).
This one is rather unusual, and I suppose Charles is right: it has to be an artefact. With an FET in the right conditions, it could be caused by thermal effects, but in a bipolar, it's rather the other way round.
LV
A number of phenomena can cause a negative resitance; but generally, it's the other variety, ie an increase in current causing a decrease of the voltage across the device (avalanche+injection, diacs, etc).
This one is rather unusual, and I suppose Charles is right: it has to be an artefact. With an FET in the right conditions, it could be caused by thermal effects, but in a bipolar, it's rather the other way round.
LV
OzMikeH said:the standard unit of negative resistance is the "Mho"
(that may be a joke at my expense when I was an apprentice, I have never encountered it personally)
The term 'mho' was used in the past as the unit of electrical conductance, the reciprocal of resistance (1/R). The term has been replaced by 'siemens'.
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