BJT and FET Characteristics Quiz
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Questions and Answers

What are the three terminal devices discussed in the course?

  • Diode, Transistor, and MOSFET
  • BJT, JFET, and MOSFET (correct)
  • Resistor, Capacitor, and Inductor
  • LED, LCD, and OLED

What is the primary application of SQL?

Database queries

The course objectives include analyzing the basic static characteristics of ideal two-terminal and three terminal devices.

True (A)

What is the main focus of Unit 1 in this course?

<p>Bipolar Junction Transistor (BJT)</p> Signup and view all the answers

What are the two types of negative feedback discussed in Unit 4?

<p>Voltage series and current shunt.</p> Signup and view all the answers

What is the primary function of a voltage regulator circuit?

<p>To maintain a stable output voltage.</p> Signup and view all the answers

What are the three types of IC voltage regulators discussed in the course?

<p>Three terminal, variable and series voltage regulators.</p> Signup and view all the answers

Which of these is NOT a type of oscillator discussed in Unit 5?

<p>Zener (C)</p> Signup and view all the answers

Barkhausen criteria are used to determine the stability of electronic circuits.

<p>True (A)</p> Signup and view all the answers

Which of these is NOT a type of transistor voltage regulation?

<p>Shunt voltage regulator (B)</p> Signup and view all the answers

The course requires a basic understanding of Semiconductor Physics.

<p>True (A)</p> Signup and view all the answers

The minimum number of assignments for this course should be eight, covering all topics.

<p>True (A)</p> Signup and view all the answers

The course is worth four credits.

<p>True (A)</p> Signup and view all the answers

What are the three types of power amplifiers discussed in Unit 3?

<p>Class A, Class B, and Class AB.</p> Signup and view all the answers

What are the effects of negative feedback on input and output impedance?

<p>Negative feedback increases input impedance and decreases output impedance.</p> Signup and view all the answers

What is the primary purpose of the Barkhausen criteria?

<p>To determine if a circuit will oscillate.</p> Signup and view all the answers

What is the difference between a three-terminal voltage regulator and a variable voltage regulator?

<p>A three-terminal voltage regulator has a fixed output voltage, while a variable voltage regulator allows for adjustment of the output voltage.</p> Signup and view all the answers

What is the most common type of voltage regulator used in transistor applications?

<p>The most common type of voltage regulation used in transistor applications is the three-terminal voltage regulator.</p> Signup and view all the answers

Flashcards

Bipolar Junction Transistor (BJT)

A semiconductor device with three terminals: Emitter, Base, and Collector. It's a current-controlled device where a small base current controls a larger collector current.

BJT Biasing

The process of setting the operating point of a BJT amplifier by providing a specific DC voltage and current to the base, emitter, and collector.

Current Gain (β)

The ratio of the collector current (Ic) to the base current (Ib) in a BJT. It's a measure of the transistor's current amplification ability.

Common Emitter Amplifier (CE)

A type of BJT amplifier where the input signal is applied to the base and the output signal is taken from the collector.

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Common Collector Amplifier (CC)

A type of BJT amplifier where the input signal is applied to the base and the output signal is taken from the emitter.

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Common Base Amplifier (CB)

A type of BJT amplifier where the input signal is applied to the emitter and the output signal is taken from the collector.

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Field Effect Transistor (FET)

A three-terminal semiconductor device where current flow is controlled by an electric field created by a voltage applied to the gate terminal.

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Junction Field Effect Transistor (JFET)

A type of FET where the gate is a reverse-biased pn junction that controls the channel conductivity.

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Pinch-Off Voltage (Vp)

The voltage at which the channel of a JFET is completely pinched off, effectively stopping current flow.

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Drain Saturation Current (Idss)

The maximum current that can flow through the channel of a JFET when the gate-source voltage is zero.

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Metal Oxide Semiconductor Field Effect Transistor (MOSFET)

A type of FET where the gate is an insulated electrode that controls the channel conductivity through an electric field.

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Metal Oxide Semiconductor Field Effect Transistor (MOSFET)

A MOSFET where the gate is made of a metal or polysilicon and is insulated from the channel by a thin layer of silicon dioxide.

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Cut-Off State

The state where current flow through the channel of a MOSFET is blocked, effectively turning the transistor off.

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On State

The state where current can flow freely through the channel of a MOSFET, effectively turning the transistor on.

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Class A Amplifier

A power amplifier that operates in class A mode, delivering output power during the entire input signal cycle.

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Class B Amplifier

A power amplifier that operates in class B mode, delivering output power only during half of the input signal cycle.

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Class AB Amplifier

A power amplifier that operates in class AB mode, delivering output power for more than half of the input signal cycle but less than the entire cycle.

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Class C Amplifier

A power amplifier that operates in class C mode, delivering output power for a very small portion of the input signal cycle.

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Class D Amplifier

A power amplifier that operates in class D mode, using switching techniques to amplify signals with high efficiency.

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Crossover Distortion

The process of eliminating unwanted distortions in an amplifier's output signal, especially in push-pull amplifiers.

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Voltage Regulator

A circuit that utilizes negative feedback to stabilize the output voltage and improve its regulation.

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Series Voltage Regulator

A type of voltage regulator that uses a series transistor to regulate the output voltage.

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Shunt Voltage Regulator

A type of voltage regulator that uses a shunt transistor to regulate the output voltage.

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Voltage Series Feedback

A type of negative feedback where the feedback signal is proportional to the output voltage and is fed back to the input in series with the input signal.

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Voltage Shunt Feedback

A type of negative feedback where the feedback signal is proportional to the output voltage and is fed back to the input in parallel with the input signal.

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Current Series Feedback

A type of negative feedback where the feedback signal is proportional to the output current and is fed back to the input in series with the input signal.

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Current Shunt Feedback

A type of negative feedback where the feedback signal is proportional to the output current and is fed back to the input in parallel with the input signal.

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Oscillator

A circuit that generates an oscillating output signal without any external input signal.

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RC Oscillator

A type of oscillator that uses a combination of resistance and capacitance to determine its frequency.

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LC Oscillator

A type of oscillator that uses a tuned LC circuit to determine its frequency.

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UJT Oscillator

An oscillator that uses a unijunction transistor (UJT) to generate oscillations.

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Relaxation Oscillator

An oscillator that uses a combination of resistors and capacitors to create a sawtooth waveform.

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Study Notes

Course Objectives

  • Introduce static characteristics of ideal two-terminal and three-terminal devices
  • Introduce semiconductor devices (BJT, JFET, MOSFET), their characteristics, operations, and applications
  • Analyze BJT, FET, and MOSFET circuits for small signals at low and high frequencies
  • Simulate electronic circuits using software, verifying desired results

Course Outcomes

  • Comply with and verify device parameters, using any stated method
  • Implement and test circuit performance

Unit 1: Bipolar Junction Transistor (BJT)

  • BJT construction, working, characteristics
  • Transistor as a switch, configurations
  • Current gain equation, stability factor
  • Need for biasing BJT, transistor biasing methods
  • Analysis of single stage amplifier
  • RC coupled amplifier, effects of bypass and coupling capacitors
  • Frequency response of CE amplifier
  • Emitter follower, cascaded amplifier
  • CE, CC, and CB configurations in multistage amplifiers

Unit 2: Junction Field Effect Transistor (JFET) and MOSFET

  • JFET characteristics, pinch-off voltage, drain saturation current
  • JFET amplifiers (CS, CD, CG), small-signal JFET model
  • FET as a voltage variable resistor (VVR)
  • MOSFET overview (DMOSFET, EMOSFET, power MOSFET, n MOSFET, p MOSFET, CMOS devices)
  • Handling precautions of CMOS devices
  • MOSFET as an amplifier and switch
  • Biasing in MOSFET
  • Small-signal operation and models, single-stage MOS amplifier
  • MOSFET capacitances
  • CMOS inverter
  • Comparison of FET with MOSFET and BJT regarding device and circuit parameters

Unit 3: Power Amplifiers

  • Introduction and classification of power amplifiers (A, B, AB, C, D)
  • Transformer coupled class A amplifier
  • Class B push-pull, complementary symmetry amplifier
  • Efficiency calculation, power output, power dissipation
  • Cross-over distortion and its elimination
  • Heat sink design

Unit 4: Feedback Amplifiers

  • Principle of negative feedback in electronic circuits
  • Voltage series, voltage shunt, current series, current shunt feedback types
  • Typical transistor circuit effects of negative feedback
  • Input and output impedance, voltage and current gains
  • Bandwidth, noise, and distortion

Unit 5: Oscillators and Voltage Regulator Circuits

  • Principle of positive feedback, stability concept in electronics circuits
  • Barkhausen criteria for oscillation
  • RC, Clapp, Wien bridge, Colpitt, Hartley, tuned LC, UJT, relaxation oscillators
  • Transistor application: Discrete transistor voltage regulation (series, shunt)
  • IC voltage regulators (three terminal, variable)

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Description

Test your understanding of bipolar junction transistors and field effect transistors with this quiz. Covering their construction, working principles, configurations, and applications, this quiz helps reinforce the concepts learned in Unit 1 and Unit 2. Perfect for students looking to assess their knowledge on semiconductor devices and circuit analysis.

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