Lect.15| BJT as an Amplifier| DC&AC Quantities| BJT as a Switch| Switching| Cutoff| Saturation
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Dear all, in this video lecture (Lecture-15) we have to learn several topics from the course of Electronics-1. Major topics of this lecture include:
The BJT as an Amplifier
Amplification and Amplifier
DC and AC quantities
Voltage Amplification
The BJT as an Switch
Switching
On and OFF condition
Switching operation
Conduction in cutoff
Conduction in saturation
Application of a transistor switch
{Lect.15| BJT as an Amplifier| DC&AC Quantities| BJT as a Switch| Switching| Cutoff| Saturation}
Previously, in Lecture: 01 - 14, the major topics discussed were:
Lecture-01: Introduction to The Course: Course Description, Course Outlines, Recommended Books for the course, Prerequisite Details (AC and DC circuit Analysis) for Electronics-1, Differences Between the Fields of "Electrical and Electronics"
Lecture-02: The Atom and Atomic Structure, The Bohr Model: Electron, Proton, Neutron & Nucleus, Orbit, Shell, Core etc., Atomic Number, Electrons and Shells, Valence Electrons, Ionization Process etc.
Lecture-03: Classification of Matter: Insulators, Conductors and Semiconductors, The Carbon Atom (covering Core of an Atom), The Energy Bands: Valence Band & Conduction Band, Energy Gap or Band Gap, Energy level diagram, Semiconductor vs. Conductor Atom, Silicon vs. Germanium Atom, Covalent Bond and Silicon crystal
Lecture-04: Conduction in Semiconductors, Electron-Hole Pair, Electron Current, Hole Current, Doping (Process), Formation of N-type Semiconductors: Majority Charge Carriers (Electrons), Minority Charge Carriers (Holes), Formation of P-type Semiconductors: Majority Charge Carriers (Holes), Minority Charge Carriers (Electrons)
Lecture-05: The PN-Junction Formation, Diffusion Across a PN-Junction
The Formation of the Depletion region, Barrier Potential and its Significance, Values of Barrier potential in Silicon and Germanium, Energy diagrams (PN Junction & Depletion Region), Energy Hill
Lecture-06: The Diode and its Operation, The electrical symbol for a diode, Several diode package configurations, Forward Bias a Diode, Forward-bias and required conditions, Effect of forward bias on the depletion region, Barrier potential and its effects during forward-bias, Reverse Bias a Diode, Reverse-bias and required conditions, Reverse current, Reverse breakdown
Lecture-07: Voltage–Current Characteristic of a Diode, VI-characteristic for Forward Bias, Graph the V-I curve for Forward Bias, Barrier Potential affects the V-I curve, Dynamic Resistance, VI-characteristic for Reverse Bias, Graph the V-I curve for Reverse Bias, Complete VI-characteristic curve, Effects of Temperature on the Diode Characteristic, Diode approximations (Three Diode Models), Ideal, Practical, Complete Diode Model
Lecture-08: Basic Dc Power Supply, Rectifiers (HWR, FWR), Half Wave Rectifier, Block Diagram and Operation, Average value of a HWR output voltage, Effect of barrier potential on a HWR output, Peak Inverse Voltage (PIV), Full Wave Rectifier (FWR), Center-tapper FWR, Bridge FWR
Lecture-09: Limiter/Clipper/Slicer, Simple Diode Limiter Circuit, Positive Limiter, Negative Limiter, Dual Limiter, Biased Limiter Circuit (Positive/Negative/Dual), Diode Clamper or DC-restorer, Operation of Diode Clamper Circuit, Positive Clamper, Negative Clamper
Lecture-10: Special Purpose Diodes, Zener Diode, Schematic symbol, Zener Operation, Zener breakdown, Avalanche breakdown, Breakdown characteristics, Zener Regulation, Zener Equivalent Circuit, Temperature Co-efficient, Zener Power Dissipation and Zener Derating
Lecture-11: Zener Regulation, Zener Voltage Regulation, Zener Regulation with a Variable Input Voltage, How Zener diode can regulate a DC voltage, Zener regulation example,
Zener limiting: Three basic ways of Zener Diode limiting action (Positive, Negative and Dual)
Lecture-12: Varactor Diode, Optical diodes: LED, Quantum Dots, Photo Diode
Other types of Diodes: Laser diode, Schottky diode, PIN diode, Step-recovery diode, Tunnel diode, Current regulator diode
Lecture-13: Transistor: Types of Transistors, BJT and FET
Bipolar Junction Transistor: NPN and PNP, BJT Structure, Schematic Symbols, Basic operation, BE-junction (Forward Bias), BC-junction (Reverse Bias), Transistor currents
Lecture-14: Bipolar Junction Transistor (BJT), Characteristics and Parameters, Transistor DC biasing, DC Beta (βDC), DC Alpha (αDC), Current and Voltage analysis, Collector Characteristics Curve, Cutoff, Saturation etc.
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