Semiconductor Electronics: Materials, Devices and Simple Circuits

This set of flashcards covers key concepts from the lecture on Semiconductor Electronics, focusing on materials, devices, and basic circuits.

What materials are used in solid state electronic devices?

Semiconductors are the basic materials used in solid state electronic devices like diode, transistor, ICs, etc.

How are solids classified based on electrical conductivity?

Solids are classified as metals, semiconductors, and insulators based on their electrical conductivity or resistivity.

What is the resistivity range of metals?

Metals have a resistivity range of approximately ρ ~ 10–2 – 10–8 Ω m.

What is an intrinsic semiconductor?

Intrinsic semiconductors are pure semiconductors where the number of free electrons is equal to the number of holes.

What are the two types of dopants used in semiconductors?

Pentavalent (valency 5) and trivalent (valency 3) dopants are used for doping semiconductors.

What happens in a p-n junction under forward bias?

The depletion layer width decreases, and the barrier height is reduced, allowing diffusion current to increase.

What is the threshold voltage of a silicon diode?

The threshold voltage or cut-in voltage for silicon diodes is typically around 0.7V.

What is the difference between n-type and p-type semiconductors?

n-type semiconductors have excess electrons as majority carriers, while p-type semiconductors have excess holes.

What is the barrier potential in a p-n junction?

The barrier potential is the voltage difference across the junction that prevents the movement of carriers.

What is rectification in the context of diodes?

Rectification is the process of converting AC voltage to DC voltage using a diode.

What are the two types of rectifiers described?

Half-wave rectifiers and full-wave rectifiers are the two types explained in the course.

What role do filters play in rectifiers?

Filters are used to smooth out the pulsating voltage from rectifiers to get a steady DC output.