I. Diode and Diode Application 1. Diodes 2. Rectification 3. Power supply filter 4. Applications of diodes ← Signal rectifier ← Diode gate ← Diode clamps ← Limiter Diodes Some elements are linear (resistors‚ capacitors‚ inductors)‚ which means that doubling the applied signal (let us say a voltage) produces a doubling of the response (let us say a current). They are also passive – they do not have built-in source of power. They are two-terminal devices‚ (which
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Light Emitting Diodes (LEDs) ELE 432 Assignment # 3 Vijay Kumar Peddinti Light Emitting Diodes Principle Synopsis: To explain the theory and the underlying principle behind the functioning of an LED Brief History: • The first known report of a light-emitting solid-state diode was made in 1907 by the British experimenter H. J. Round. (material.eng.usm.my/stafhome/zainovia/EBB424e/LED1.ppt) • • • • • • In the mid 1920s‚ Russian Oleg Vladimirovich Losev independently created the first LED‚ although
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1N4728A - 1N4758A — Zener Diodes April 2009 1N4728A - 1N4758A Zener Diodes Tolerance = 5% DO-41 Glass case COLOR BAND DENOTES CATHODE Absolute Maximum Ratings * Symbol PD Ta = 25°C unless otherwise noted Parameter Power Dissipation @ TL 50C‚ Lead Length = 3/8” Derate above 50C Value 1.0 6.67 -65 to +200 Units W mW/C C TJ‚ TSTG Operating and Storage Temperature Range * These ratings are limiting values above which the serviceability of the diode may be impaired. Electrical Characteristics
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Diodes‚ which are integral components in almost all electronic devices‚ are essentially two pin semiconductor devices which possess the ability to conduct current unidirectionally. Diodes are highly versatile and find numerous applications in various disciplines. Some of the noteworthy applications of Diodes include 1. Rectification 2. Wave Shaping 3. Frequency Multiplier Circuits 4. Voltage Multiplier Circuits 5. Signal Mixers 6. Switches 7. Tuning Let us examine each of these applications
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Maternity Test 2 A woman who is pregnant for the third time is referred to as a: Multigravida A woman who is 8 weeks pregnant has a daughter age 5 and a son age 2. Previously‚ she had a spontaneous abortion at 12 weeks’ gestation. Therefore‚ she is gravida _4____‚ para ___2__. A woman’s last normal menstrual period began July 4. Using Nägele’s rule‚ what would be her estimated date of delivery? April 11 A woman comes to the physician’s office because she has missed a menstrual period
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Forward biased diode: cathode anode Varactor is a silicon diode optimized for its variable capacitance when reversedbiased. Used for tuning frequencydependent equipment. Zener Diode is designed to operate in the breakdown region; used for voltage regulation. Varactor Zener N + P electron flow depletion layer An ideal diode acts like a closed switch when forward biased and an open switch when reverse biased. 1st approximation calculations assume an ideal diode. 2nd approximation
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PNS Study Guide CH. 13 PNS 1 Notes: From Sensation to perception • 3 levels of integration of sensation- receptor‚ circuit‚ perceptual o What happens with the processing at each level Sensory Receptors • Classifications: o Stimulus-mechanoreceptor‚ thermoreceptor‚ chemoreceptor‚ photoreceptor‚ nociceptor o Location- exteroceptor‚ interoceptors‚ proprioceptors o Complexity- simple‚ complex • Adaptation of receptors PNS 2 Notes (Nerves):
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The Neuromuscular Junction by: Dominique Latham 651 words A neuromuscular junction is a place in the body where the axons of motor nerves meet the muscle‚ thus transmitting messages from the brain which cause the muscle to contract and relax. Every organism has thousands of neuromuscular joints which are the locations and means by which the motor neuron of the nervous system that instructs the muscle cells of the muscular systems to take action. Action that ‚ in turn lead to movements of muscles
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Tight junctions (TJs) are occluding junctions which act as barriers that control paracellular permeability and regulate trans-epithelial water and solute movement. The structures are composed of integral transmembrane proteins that link adjacent cells‚ with an effect on cell-cell adhesion and epithelial permeability. It also works as a boundary between the apical and basolateral plasma membrane domains to create the polarisation of endothelial and epithelial cells. These junctions are comprised of
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BASIC ELECTRONICS MODULE 3 Bipolar Junction Transistor Prepared by H V Balachandra Achar Senior Lecturer‚ Dept. of E&C Engg.‚ M I T‚ Manipal Department of Electronics and Communication Engineering‚ Manipal Institute of Technology‚ Manipal‚ INDIA Syllabus • • • • • • • • Introduction to Bipolar Junction Transistor BJT Operation BJT Configurations Tutorials BJT Biasing Tutorials BJT Amplifier Tutorials Department of Electronics and Communication Engineering‚
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