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Author Topic: Is 2 diodes = 1 SCR?  (Read 1447 times)

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Offline ali6x944Topic starter

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Is 2 diodes = 1 SCR?
« on: May 04, 2016, 04:53:18 pm »
Hi everyone,
I was reading about SCR recently and I saw the internal structure of an SCR and how people were able to get the same functionality with transistors so this got me wondering if that could be possible with a pair of diodes in series ?
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Offline Wobbegong

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Re: Is 2 diodes = 1 SCR?
« Reply #1 on: May 04, 2016, 04:56:19 pm »
Better to use coupled PNP/NPN transistors like they show in the wikipedia article on SCRs.
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Offline danadak

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Re: Is 2 diodes = 1 SCR?
« Reply #2 on: May 04, 2016, 05:02:22 pm »
No to 2 diodes in series, you need a mechanism that has V trip point and
positive feedback.


http://electronics.stackexchange.com/questions/141987/how-can-i-create-an-scr-using-a-pnp-and-npn


Regards, Dana.
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Love Cypress PSOC, ATTiny, Bit Slice, OpAmps, Oscilloscopes, and Analog Gurus like Pease, Miller, Widlar, Dobkin, obsessed with being an engineer
 

Offline ali6x944Topic starter

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Re: Is 2 diodes = 1 SCR?
« Reply #3 on: May 04, 2016, 05:16:15 pm »
Oh what a bomber, I was realy excited when I first thought about it, but thanks for explaining I really think a two diode SCR would be a slick thing thuo
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Offline nogood

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Re: Is 2 diodes = 1 SCR?
« Reply #4 on: May 04, 2016, 11:14:19 pm »
Two diodes in series wouldn't work, you need a semi-conductor junction, not a piece of wire in between
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