Diode by hashir ahmed
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The document discusses the characteristics and operation of an ideal diode, including analyzing simple circuits involving diodes. It examines the current-voltage relationship of diodes and how rectifier circuits use diodes to produce a voltage waveform from a sinusoidal input. Examples are provided to determine the conduction angle, peak diode current, and maximum reverse bias voltage for a rectifier circuit charging a battery from a sinusoidal source.
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You can learn every concept related to it here.Enjoy clipping :)
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This document summarizes an experiment on diode clipping and clamping circuits. It includes the objectives, equipment used, circuit diagrams of clipping and clamping circuits tested, and a report of the results. The report explains that clipping cuts off part of a signal waveform while clamping shifts a signal to a different DC level without changing its shape. It analyzes the operation of the clipping and clamping circuits and discusses the output waveforms observed on an oscilloscope. It notes some differences between the ideal circuit behavior described and actual results due to non-ideal diode characteristics.
Eg1108 rectifiers
The document discusses diode rectifiers and power supplies. It describes how diodes allow current to flow in only one direction, and how this property is exploited in rectifier circuits to convert alternating current (AC) to direct current (DC). Specifically, it examines the half-wave rectifier circuit, which uses a single diode to rectify the positive half of the AC waveform. The output of the half-wave rectifier is pulsed DC with a large ripple. Power supplies often use rectifier circuits to convert high voltage AC mains electricity to a lower voltage DC for electronic circuits.
Microelectronic circuits and devices: chapter one
This document discusses diode models and characteristics. It introduces the ideal diode model and its voltage-current relationship. It then discusses more realistic models that account for the diode's finite voltage drop of around 0.7V. The document explains how to determine the diode constants like the emission coefficient and leakage current by analyzing voltage-current curves. It also discusses how temperature affects the diode's leakage current and voltage characteristics.
377275109-Ch-2-Uncontrolled-Rectifiers-Autosaved.pptx
This document discusses uncontrolled rectifiers, which use diodes to convert alternating current (AC) to direct current (DC). It covers the operation and analysis of single-phase half-wave and full-wave rectifiers, as well as three-phase rectifiers, with both resistive and inductive loads. Key points covered include the output voltage and current calculations, effects of adding capacitors or inductors, and how source inductance can affect rectifier operation. The objectives are to understand different rectifier circuits and analyze their performance parameters.
Semiconductor diodes
Semiconductor
If a valence Electron acquires sufficient kinetic energy to break its covalent bond and fills the void created by a hole then a vacancy, or hole will be created in the covalent bond that released the electron
Hence there is a transfer of holes to the left and electrons to the right
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This document provides a summary of Lecture 05 which covered diode applications and special diode types. It discusses how diodes can be used in rectifier circuits to convert AC to DC for powering electronics. Different rectifier circuit types are examined including half-wave, full-wave, and bridge rectifiers. Filter capacitors are also discussed for smoothing the pulsating DC output of rectifiers. Additional applications like limiting, clamping, and voltage doubling circuits are covered. Finally, special diode types such as LEDs, photodiodes, Schottky diodes, varactor diodes, and Zener diodes are introduced.
08_electronics.basics and introduction12
This document provides an overview of basic electronics concepts including circuits, power supplies, transistors, and impedance. It discusses basic circuit analysis and relations involving voltage, current, resistance, capacitance, and inductance. Examples are given of voltage dividers, battery output impedance, full-wave rectification using a diode bridge, voltage regulation using zener diodes and voltage regulator ICs, transistor operation in amplification and switching modes, and an improved zener regulator circuit using a transistor buffer.
08_electronics.basics and introduction23
This document provides an overview of basic electronics concepts including circuits, power supplies, transistors, and impedance. It discusses basic circuit analysis and relations involving voltage, current, resistance, capacitance, and inductance. Examples are given of voltage dividers, battery output impedance, full-wave rectification circuits, smoothing circuits using capacitors, zener diode voltage regulation, and transistor operation in amplification and switching modes.
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Lec 15.pptx
This document discusses diodes and their I-V characteristics. It covers regular p-n junction diodes, including their forward and reverse biasing modes. In the forward mode, the diode resistance decreases as voltage increases from 0 to 0.7V, becoming nearly zero above 0.7V. In reverse mode, the diode acts as an open circuit until reverse breakdown voltage is exceeded. Example problems demonstrate using the ideal and constant voltage drop diode models to calculate current in circuits. The document concludes with a brief section on AC analysis of regular diode circuits.
Diodes
Diodes allow current to flow in only one direction. They have a small, constant voltage drop of about 0.7V when conducting electricity forward. Diodes do not conduct in reverse unless the reverse voltage exceeds a maximum breakdown value. There are two main types: signal diodes for small currents below 100mA, and rectifier diodes for larger currents used in power supplies to convert alternating current to direct current. Zener diodes are designed to conduct reliably in reverse at a specific breakdown voltage, making them useful for maintaining a fixed voltage in circuits.
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Diode by hashir ahmed
- 1. PRESENTATION TOPIC IDEAL DIODE SYED HASHIR AHMED ROLL# 130
- 2. Objectives Understand the characteristics of an ideal diode. Analyze simple circuits involving ideal diodes.
- 4. Computing iD and vD What is the current through the diode (iD) and the voltage across the diode (vD) for the following two circuits?
- 5. Rectifier Circuit What voltage waveform would we observe across the output of this circuit?
- 7. Rectifier Circuit Operation (Cont’d) What voltage waveform would we observe across the diode vD?
- 8. Voltage Transfer Characteristic of the Rectifier Circuit
- 9. The source vS is a sinusoid with a 24 Vpeak amplitude. The diode is used to charge a 12 V battery and the 100 resistor limits the current. We want to determine the fraction of each cycle during which the diode conducts. We also wish to find the peak-value of the diode current and the maximum reverse-bias voltage that appears across the diode.
- 10. Solution We reason that the diode will not begin to conduct until vS exceeds 12 V. Likewise, the diode will stop conducting once vS again reaches 12 V. This defines the conduction angle, 2 (i.e., the fraction of the sinusoidal cycle over which the diode conducts). Hence, we reason that the diode will conduct provided that 24V sin 12 V. Or 30o ≤ ≤ 150o (or 1/3 of a cycle). 24V 12V The peak value of the diode current is I D 0.12 Amps 100
- 11. Solution (Cont’d) The maximum reverse-bias voltage that appears across the diode is simply: 24 V + 12 V = 36 V
- 12. Let’s begin by assuming that diodes D1 and D2 are conducting: 10 0 I D2 1mA 10k KCL (node B): 0 ( 10) I 1mA I 1mA 5k For this second circuit the same assumption gives nonsensical results (verify this) We assume that D1 is OFF and D2 is ON. Consequently, VB = 3.3 V (verify).