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Introduction to Semiconductors and Diodes Quiz

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Introduction to Semiconductors and Diodes Quiz

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Questions and Answers

In which BJT configuration is the base the common point, the emitter is negative, and the collector is positive?

Common-Emitter (CE) and Common-Collector (CC)

Common-Emitter (CE)

Common-Collector (CC)

Common-Base (CB) (correct)

What are the input parameters for the Common-Base (CB) BJT configuration?

VEE and IE

VB and IB

VBC and IC

VBE and IE (correct)

What happens to the minority carriers when VCB is increased in the Common-Base (CB) BJT configuration?

Minority carriers combine with holes in the base

Minority carriers remain constant

Minority carriers are swept from base to collector (correct)

Minority carriers decrease

Which BJT configuration has the common point used to give a single reference to the input and output voltage of the transistor?

Common-Base (CB) Signup and view all the answers

What are the output parameters for the Common-Base (CB) BJT configuration?

VCB and IC Signup and view all the answers

What is the purpose of disabling the emitter resistance in the amplifier circuit?

To increase the output voltage Signup and view all the answers

What effect does partially disabling the emitter resistance have on the amplifier circuit?

Reduces the voltage gain Signup and view all the answers

What is the role of the capacitor CE=47μF in the amplifier circuit?

To block DC signals from reaching the output Signup and view all the answers

What is the significance of finding IB current for Vin=40mV without breaking the circuit?

To ensure proper biasing of the transistor Signup and view all the answers

How does increasing VCB in the Common-Base (CB) BJT configuration affect the minority carriers?

Decreases their concentration Signup and view all the answers

Study Notes

Introductory Electronics (MBS108) Lecture 9 topic: Semiconductors & Diodes, focusing on BJT in normal operation
BJT: Bipolar Junction Transistor, used with two types of carriers: electrons and holes
Two DC sources connected: BJT in normal operation
Base is common point, emitter is negative, collector is positive
Reverse current flows through the junction due to minority carriers
Three BJT configurations: Common-Base (CB), Common-Emitter (CE), and Common-Collector (CC)
Common-Base (CB) configuration:
- E-B junction is forward biased, C-B is reverse biased
- Common point is used as a reference for input and output voltage
Common-Base (CB) characteristics:
- Input parameters: VBE (Base-Emitter voltage) and IE (Emitter current)
- Output parameters: VCB (Collector-Base voltage) and IC (Collector current)
- Input characteristics:
  - IE depends on VBE for different VCB
  - IE and VBE behave like a forward-biased diode
  - Increasing VCB increases the number of minority carriers, increasing IE
  - VCB's effect on input can be negligible.

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Description

Test your knowledge on the basics of semiconductors and diodes including BJT in normal operation, current direction, and DC sources.