Tag: Thyristors

The Shockley Diode Features & Operation

The Shockey diode is a four layer sandwich of PNPN semiconductor material very similar to the SCR but without a gate as illustrated in the Figure 1.0 below:

Shockley or 4-layer diode (PNPN diode)
Figure 1.0 Shockley or 4-layer diode (PNPN diode)

Transistor equivalent of Shockley diode
Figure 1.1 Transistor equivalent
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The Diac Features & Applications

Features of a Diac

The diac is a two-terminal, semiconductor, bi-directional switching device. It can conduct in both directions. The diac closely resembles a PNP transistor without an external base terminal.

Diac structure
Figure 1.0 Diac Structure
Diac Symbol
Figure 1.1 Diac Symbol

Operation

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