SCR
How can you determine the value of V_FBO?
From the Datasheet
How many terminals does a GTO have?
3
How many terminals does an SCS have?
4
How can you determine the value of the intrinsic stand-off ratio?
From the datasheet
How can you change the forward breakover voltage of a DIAC
The V_FBO of a DIAC cannot be changed.
What polarity of a pulse signal must be applied to the gate terminal of an SCR to turn it on?
Positive pulse
What is the primary difference between a GTO and an SCR in terms of its operation?
A GTO can be turned off through the gate terminal using a negative pulse.
What polarity of a pulse must be applied to the anode gate of an SCS to turn it off?
A positive pulse.
The PUT is a 4-layer device, while the UJT is a "2-layer device".
If you were to describe a TRIAC using other semi-conductor devices, how would you describe it?
2 SCR's in inverse-parallel connection.
What polarity of a pulse must be applied to the gate of an SCR to turn it off?
An SCR cannot be turned off through its gate terminal.
What polarity of a pulse must be applied to the gate of a GTO to turn it off?
A negative pulse.
How can you determine the value of the voltage required to turn on a UJT through the emitter terminal?
V_P = V_D +\eta(RB1/(RB1+RB2))
When will a TRIAC turn on?
When its forward breakover voltage is breached.
What happens to the characteristic curve of an SCR when a positive voltage is applied to its gate?
The forward breakover voltage decreases and the graph seemingly shrinks.
To turn off a GTO, what must be the relationship between the gate voltage and the cathode voltage?
The voltage across the cathode must be greater than the voltage of the gate.
All of them are incorrect.
Given a voltage source of 20V, what must be the value of the resistances connected to the anode terminal of a PUJT such that it would turn on at 8V?
In the given circuit, when will SCR2 turn on?
When the Zener diode turns on which happens when the voltage of the battery reaches 11V.
In the given circuit, what may cause the GTO to turn off?
The voltage of the gate is equal to the voltage of the cathode.
In the given circuit, when will the SCS turn on?
When the value of the variable resistance R_s decreases and the voltage across the gate is becomes positive enough.
Explain the characteristic curve of a UJT.
Valley voltage
Holding current
The forward breakover voltage of a TRIAC can be changed by...