The DIAC has a very different structure. It has the structure of a symmetric NPN transistor. Its operation is based on avalanche breakdown mode. I made my model based on all this. This model reflects the work of the real DIAC quite accurately.A Shockley diode is a four layer (P-N-P-N) device. It conducts when it is forward biased and stops conducting when it is reverse biased. The major difference from conventional diode is that a Shockley diode does not start conducting until the forward voltage exceeds break-over voltage.
A DIAC acts like two Shockley diodes connected in parallel with one being reversed. It is for AC and has the same characteristics for both directions of voltage.
Regards,
Keith
Yes, a transistor will work just as well. You just have to make sure the max. collector current is not exceeded.Or, if ordering one is too much trouble:
But is it possible to use a DIAC for a relaxation oscillator?hi Imarcg,
Welcome to AAC.
Please a diagram of the circuits you are referring too.
E
but is it possible to use the DIAC for a relaxation oscillator?
but is it possible to use the DIAC for a relaxation oscillator?The DIAC has a very different structure. It has the structure of a symmetric NPN transistor. Its operation is based on avalanche breakdown mode. I made my model based on all this. This model reflects the work of the real DIAC quite accurately.
https://www.mikrocontroller.net/topic/403520View attachment 206766View attachment 206767
Yes.but is it possible to use the DIAC for a relaxation oscillator?
I'm surprised. Can't you see that my top drawing shows a relaxator.but is it possible to use the DIAC for a relaxation oscillator?
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