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Avalanche Breakdown and PN Junction Doping Quiz

10 Questions

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Avalanche Breakdown and PN Junction Doping Quiz

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Questions and Answers

What is the direction of the electric field in the depletion region of a pn junction?

Perpendicular to the metallurgical junction

From the n region to the p region (correct)

From the p region to the n region

Zero, as there is no electric field

What is the primary function of the built-in potential barrier in a pn junction?

To reduce the space charge width

To increase the junction capacitance

To maintain thermal equilibrium and hold back majority carrier electrons and holes (correct)

To increase the electric field in the depletion region

What happens to the potential barrier in a pn junction when a reverse-biased voltage is applied?

It decreases

It remains the same

It increases (correct)

It becomes zero

What is the term for the change in charge with voltage in a pn junction?

Junction capacitance Signup and view all the answers

What is the characteristic of the space charge region in a pn junction?

It is depleted of mobile electrons and holes Signup and view all the answers

What is the primary condition for avalanche breakdown to occur in a pn junction?

A sufficiently large reverse-biased voltage is applied Signup and view all the answers

What is the primary factor that determines the breakdown voltage in a one-sided pn junction?

Doping concentration in the low-doped region Signup and view all the answers

What type of doping profile is used to obtain specific capacitance characteristics in a pn junction?

Nonuniformly doped junction Signup and view all the answers

What is the characteristic of a hyperabrupt junction?

Doping decreases away from the metallurgical junction Signup and view all the answers

What type of diodes are hyperabrupt junctions advantageous in?

Varactor diodes Signup and view all the answers