Talk:DIAC: Difference between revisions
three layer diacs |
→can u simplify the explanation??: {{unsigned}}, link to image |
||
| Line 24: | Line 24: | ||
The DB3 and BR100 are three layer NPN devices |
The DB3 and BR100 are three layer NPN devices |
||
that do not latch. |
that do not latch. |
||
Please see I-V plot for DB3 |
Please see I-V plot for DB3 {{unsigned|192.232.155.152}} |
||
There is also plot of correct V-A characteristics on commons, but description is in Slovakian: [[:Image:Vachdiak.png]] --[[User:78.0.130.223|78.0.130.223]] 15:00, 16 October 2007 (UTC) |
|||
Revision as of 15:00, 16 October 2007
Measuring DIACs (and other thyristors)
How can I measure diac and thyristor?
- The standard method is to use a curve tracer, a specific kind of electronic test equipment that looks like an oscilloscope but can apply a variable, bipolar voltage to the device under test and measures the resulting current. Curve tracers can also apply base (trigger) bias and display how that affects the resulting change in the V-I curves.
- You can kludge up a minimalist curve tracer using an ordinary oscilloscope, an isolation transformer, and a load resistor.
A DIAC is not "two Zeners"
I'm not a registered user, so I'm not going to edit the article, but I wanted to point out that this statement: "It is similar to two Shockley or Zener diodes connected in inverse parallel." is blatantly false. Zener diodes have a point where they become virtually straight lines on the VI curve, but lack the negative resistance zone that a DIAC has. A DIAC acts a lot more like a trigger tube - once the voltage reaches the "trigger" point, the effective voltage across it suddenly drops to a very low value, and current will flow appropriately. Only when the current falls off does the voltage drop go back up. —The preceding unsigned comment was added by 70.248.228.78 (talk • contribs) .
- Your point is correct. And you needn't feel shy about editing the article just because you haven't registered yet. But I'll make your suggested edits.
can u simplify the explanation??
i am a fresher and wanted ta kno abt diac... the explanation is quite hard to understand..
a diac, its just a 2-way diode that will only conduct electricity (including AC, or oscillating current) when the breakdown voltage is exceeded. XU-engineer 18:49, 26 July 2007 (UTC)
The DB3 and BR100 are three layer NPN devices that do not latch. Please see I-V plot for DB3 — Preceding unsigned comment added by 192.232.155.152 (talk • contribs)
There is also plot of correct V-A characteristics on commons, but description is in Slovakian: Image:Vachdiak.png --78.0.130.223 15:00, 16 October 2007 (UTC)
