Exam 20: Thyristors and Optoelectronics Devices

An SCR has a critical rise rating of 20 V/μs. The device is being used in a circuit where 10 ns rise time) noise signals randomly occur. What noise amplitude is needed to cause false triggering?

Optoelectronic devices are divided into two types:

A UJT has the following values: η = 0.72 maximum) and VBB = 12 V. What is the maximum value of VP required to trigger the device into conduction?

An optocoupler has an isolation source voltage VISO) rating of 5200 Vac. This rating means that

A phase controller is used to:

The is commonly used to control triac triggering.

Irradiance is:

An optoisolator is a device that uses light to couple a signal from its input to its output.

A crowbar is used to:

The primary difference between the triac phase controller and the SCR phase controller is the fact that the triac circuit