Aero2 Signals & Systems (Part 2) Notes on BJT and transistor circuits Bipolar Junction Transistors • Physical Structure & Symbols • NPN n-type Emitter region p-type Base region n-type Collector region C Collector (C) B E (b) Emitter (E) Emitter-base junction (EBJ) Base (B) (a) Collector-base junction (CBJ) • PNP - similar‚ but: • N- and P-type regions interchanged • Arrow on symbol reversed • Operating Modes Operating mode Cut-off Active Saturation Reverse-active EBJ Reverse
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Case Circuit Board Corporation Background/Introduction Circuit Board Corporation creates and manufactures printed circuit boards. The founder‚ the late Dieter Adams had started Circuit Board Corporation in 1961‚ were the computer industry was in its introductory stages. The company started by designing and manufacturing PCB’s for minicomputer companies. Maggie Adams which was Dieter Adams beloved wife was employed as a part time employee and secretary of the board to CEO after her husband died
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Questions and Problems: 1. Describe the type of meter movement used in analog meters. The current in the circuit is used in basic meters to measure the voltage drop or current in the circuit. The current passes through the coils of wires‚ which is then magnetized. Inside the apparatus‚ there is also a permanent magnet which opposes the magnetic field of the magnetized coil of wire that is connected to the pointer therefore‚ as we see in meters‚ the pointer moves. There is also a spring connected
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Differentiator and Integrator Circuits Submittal Date: 6/11/2014 Objectives: 1. To demonstrate the operation of a differentiator 2. To demonstrate the operation of an integrator Results: The differentiator circuit caused the cosine wave to output a sine wave and a triangle wave to output a square wave. The Integrator circuit caused the sine wave to become a cosine wave and the square wave into a triangle wave. Conclusions: The differentiator circuit differentiates the wave
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"The History of the Integrated Circuit" In today’s world integrated circuits are everywhere we turn. Many of them you will find in computers. For example the microprocessor is an integrated circuit that processes all information in the computer. It keeps track of what keys are pressed and if the mouse has been moved. It counts numbers and runs programs‚ games and the operating system. Chip production today is based on photolithography. In photolithography a high energy is shone through a mask
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CIRCUITS LABORATORY EXPERIMENT 3 AC Circuit Analysis 3.1 Introduction The steady-state behavior of circuits energized by sinusoidal sources is an important area of study for several reasons. First‚ the generation‚ transmission‚ distribution‚ and consumption of electric energy occur under essentially sinusoidal steady-state conditions. Second‚ an understanding of sinusoidal behavior makes possible the prediction of circuit behavior when nonsinusoidal sources are used through the use of techniques
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the Norton’s theorem. EQUIPMENT Resistor 100Ω‚ 1kΩ and 4.7kΩ‚ digital multimeter(DVM)‚ bread board. INTRODUCTION Some circuits require more than one voltage source. Superposition theorem is a way to determine currents and voltages in a linear circuit that has multiple sources by taking one source at a time. the current in any given branch of a multiple-source linear circuit can be found by determining the currents in that particular branch produced by each source acting alone‚ with all other sources
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| Resistance and Electric Circuits | Lab 5 | | | The goal of the “Resistance and Electric Circuit” Lab was to determine the resistivity of a conducting wire given two known resistors. The main property of resistivity is that it represents how easily electrons can flow through a material. A Galvanometer is used to measure the current of the circuit and the Wheatstone Bridge is used to measure the resistances and determine the unknown resistance. This experiment also relates Ohm’s Law
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ELTR 2110 Analogue Communications: Module 1 Practice Test 1. A technique for resolving complex repetitive waveforms into sine or cosine waves and a dc component is known as: a) Harmonic Analysis b) Armstrong’s Principle c) Fourier Analysis d) Frequency Analysis Answer: c 2. The statement "information is proportional to bandwidth" is known as: a) Simpson Rule b) Shannon’s Law. c) Fourier’s Law. d) Hartley’s Law Answer: d 3. Given that a
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Circuit Protection Devices Course No: E03-005 Credit: 3 PDH A. Bhatia Continuing Education and Development‚ Inc. 9 Greyridge Farm Court Stony Point‚ NY 10980 P: (877) 322-5800 F: (877) 322-4774 info@cedengineering.com CHAPTER 2 CIRCUIT PROTECTION DEVICES LEARNING OBJECTIVES Upon completion of this chapter you will be able to: 1. State the reasons circuit protection is needed and three conditions requiring circuit protection. 2. Define a direct short‚ an excessive current
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