Talk:Constant-current diode

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Diode-Connected Transistor[edit]

I was under the impression that a diode-connected transistor is either a BJT with base connected to collector, or a JFET with the Drain and Source tied together. Can someone who is more of an expert than I confirm this? ----Miles — Preceding unsigned comment added by 128.32.13.9 (talk) 20:12, 13 March 2012 (UTC)[reply]

I'm under the impression that constant-current diodes should be possible with any unidirectional analog (or at least "multi-step") "resistor" (including e.g. triodes, or a diode + a potentiometer controlled by a servo & circuit, or certain configurations of charge-pumps, or...), as long as the resistance can be controlled via the state of one of the two "diode" connections. Never heard of it being done in those ways, though. - 99.23.95.33 (talk) 02:05, 19 August 2014 (UTC)[reply]

It's been a long time since this question was posted, but for anyone who happens to read the talk page: a "diode-connected transistor" is a transistor connected so it behaves like an ordinary diode, and that is totally different from a "constant-current diode," the subject of this article. Diode-connected transistors have an exponential current/voltage curve and no upper limit on the current until they are destroyed; constant-current diodes limit current to a maximum, safely. It was a mistake to ever include that phrase in the current article. 188.182.238.181 (talk) 17:19, 31 May 2015 (UTC)[reply]

Too specific?[edit]

The CALY Technologies products for example use the acronym "Current Limiting Devices". And they have bidirectional ones, and even the unidirectional ones seem to be described by a distinctly non-diodic current-voltage curve. Perhaps defining it as a "shorted JFET" or even a "diode" at all is too narrow these days? --RProgrammer (talk) 17:36, 26 April 2020 (UTC)[reply]