Prajakta Kelapure
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Posted #Threads
An introduction to JFET: JunctionField Effect Transistor
Field Effect Transistor · The PN junction has two dominant feature which are: 1. Injection of minority carriers with forward bias The first point is used...
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Introduction to Amplifiers - Difference between Power Amplifier and Voltage Amplifier
Many of the input signals have desired frequency, waveform but this signals cannot be used because of its small amplitude. This is because the circuits or...
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Testing of a Refrigerator PCB & data loggind by LabVIEW
Hi all, I did my final year project on " Jig for the refrigerator PCB and its analysis in LABVIEW". While the project I published a...
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Bipolar Junction Transistor (BJT) Tutorial And Notes
BIPOLAR JUNCTION TRANSISTOR A bipolar junction Transistor or BJT or transistor is a small electronic device which can be used either as a amplifier or a...
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Electronic Filters: Different Types Explained
1. The output from the rectifier circuits is not purely DC but consist of some amount of AC component into it. This AC component is known...
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Difference Between Center Tap Full Wave Rectifier And Bridge Rectifier
The main difference in half wave and full wave rectifier is that the complete cycle is utilized in full wave rectifier. Alternate half cycle is inverted...
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Half Wave Rectifiers Brief Explanation - Operation, Advantages And Disadvantages
The rectifiers are broadly classified into two types viz: Half Wave rectifier and Full wave rectifier. Lets discuss Half Wave rectifiers today. Circuit of Half wave...
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Numericals on Transistors - Questions & Answers [Solved]
Numerical on current , amplification factors of transistors Some basics: 1. Generalized expression for collector current: IC = α IE +IC0[1-e(Vc/VT)] Where VC is the negative....
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Current components in Transistor
Transistor current components (Very very Important) 1. Current conduction in N-P-N transistor is because of electrons and that in P-N-P is due to holes. The conventional...
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Transistor Biasing
Biasing of the transistor: 1. We know that for normal operation of the transistor the first junction i.e. the emitter base junction should be forward biased...
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How does the transistor work?
How does the transistor work? P.S. :We are dealing with normal operation of the transistor for this expalnation 1. The process of applying dc voltages across...
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What is Bipolar junction transistor?
Bipolar Junction transistor: 1. A solid state device made up of single crystal. 2. A current controlled device. 3. It is compact in size, rugged construction,...
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Rectifiers: Why the DC power supply is needed?
Rectifiers Why the DC power supply is needed? 1. Electrical power is generated and transmitted and distributed in the form of AC but for operation of...
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Viva voice_2
Viva Voice 1. What is P-N Junction? P-type and N-type semiconductor pieces placed together so as to form a junction. 2. Why is silicon preferref over...
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Manjul Bhargava , an Indian-origin, earns Fields Medal
A young mathematician from Princeton university won Fields medal on tuesday. It is said that this is more difficult to win than a nobel. All congrats...
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How the Zener Works?
How the Zener works??? A P-N junction diode lets current flow in only one direction and needs to be installed in the correct direction. A zener...
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Two Terminal Semiconductor Devices
Two Terminal Devices1. There are many two terminal devices which has a single P-N junction such as zener diode, varactor diode, schottky diode, tunnel diode etc....
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Transition and Diffusion capacitance in P-N junction diode
Transition and Diffusion capacitance Transition capacitances: 1. When P-N junction is reverse biased the depletion region act as an insulator or as a dielectric medium and...
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Expression for dynamic resistance of the diode(Repeatedly asked)
Expression for dynamic resistance Dunamic resistance is defined as the ratio of change in current at a particular point of operation. It is basically the reciprocal...
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Numericals on semiconductors... try this out
Numericals 1. Determine the concentration of electrons and holes in a sample for germanium at 300°K in which concentration of donor atoms is 2*10(14) [raise to...
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Data for numericals
Some formulas 1. Einstein’s Relationship: Dp/ µp =Dn/ µn = constant= VT 2. VT = kT/q,= ǩT where k= Boltzmann constant in J/°K= 1.38 * 10-23...
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Some Basic Definitions related to P-N junction diode
Some basic definition : Drift Current: The steady flow of electrons caused by the applied electric field constitutes the drift current. Because of the applied electric...
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Barrier Potential of PN junction diode
Determination of Barrier Potential V0 in p-n junction Or Contact difference V0 in p-njunction Or Boltzmann Relationship (Asked many a times in exams) 1. Consider a...
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Characteristics of P-N Junction diode
Characteristics of the PN junction diode Forward Biased: 1. When the external electrical field is connected such that the positive terminal of the battery is connected...
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Semiconductor Device:P-N Junction Diode
P-N Junction Diode 1. P-N junction is produced by placing a layer of p-type on one side and n-type on the other. 2. It act as...
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Intrinsic and Extrinsic semiconductors
Intrinsic and Extrinsic Semiconductors Intrinsic Semiconductors: 1. Semiconductors material in extremely pure form is called intrinsic semiconductor. 2. Free electrons and ho...
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Project ideas for image processing in LabView
Hii all, I am doing my post graduation in Signal Processing. I am searching for the project in Image Processing. I want to do it with...
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Semiconductors:Introduction
Semiconductors We all know by now that what are conductors , insulators and semiconductors. But still lets revise once. There is one more difference related to...
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Electronics: Viva Voice_1
Hii all, I have tried to gather some viva questions(basics), please let me know if they are helpful. I am trying to collect few more.
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Basic electronics :II Capacitors
Capacitors can be thought of mothers back up plan for end of month. when her stocks for the month and guests arrive, she open a stocked...
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Basic Electronics: Part II Inductors
Inductors : Its just a coil of wire which offer resistance to flow of current through it. Consider a narrow channel of water flowing through it....
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Basic Electronics Part_II: Resitors
Basic Electronics: Part 2 Resistors 1. Its a electronic or electrical device that resist the flow of elctrons through the device. 2. They are passive devices...
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Basic Electronics: Part 1 - Active and Passive Devices
Basic Electronics: Part 1 Active and Passive Device Active Devices: 1. They require external source for their operation. 2. Eg: diode, transistor, zener etc 3. These...
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Recent topic for seminar related to ionisation, electron theory
hello, I had given a seminar on ionization in ionosphere. My first seminar consists of topics as NVIS, study of radio waves in high frequency. Now...
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Introduction
Hello all, I am Prajakta Paradkar,married to Mr. Shrirang Kelapure. Discipline: Electronics I had completed my graduation from Nagpur university. I am doing my post graduation(M.E...
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