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Diane Infante

on 30 March 2013

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COMPONENTS ELECTRONICS the branch of physics and technology concerned with: the emission, behavior, movement and effects of electrons in a semiconductor and conductor the design of circuits using transistors and microchips builds on a base of BASIC CIRCUIT COMPONENTS ELECTRIC COMPONENTS along with concepts of SEMICONDUCTORS DIODES TRANSISTORS INTEGRATED
CIRCUITS INDUCTORS ACTIVE and basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields electronic components 2 types: ACTIVE and PASSIVE components rely on a source of energy DIODES PASSIVE components can't rely on a source of power, except for what is available from the (AC) circuit they are connected to inductors capacitors
for LISTENING! by:Diane Infante and Jeconiah Retulla an active semiconductor device having 3 electrodes and 3 terminals TERMINALS to create the gate controller device for the larger electrical supply
central layer or control ayer the larger electrical supply
output layer 2 TYPES NPN PNP negative-positive-negative positive-negative-positive outlet for the larger electrical supply
output layer n-type emitter material sends negative electrons to the collector p - type emitter material sends positive holes to the collector - if the charge carrier are both the holes and electrons these are called BIPOLAR JUNCTION TRANSISTORS npn switch amplifier TRANSISTORS UNIJUNCTION
EFFECT TRANSISTOR an electronic semiconductor device that has only one junction
the UJT has three terminals: an emitter (E) and two bases (B1 and B2)
the base is formed by lightly doped n-type bar of silicon. amplify the current generated by the light striking the active area.
compared to photodiodes, a large output current can be obtained, even from a small active area a transistor that uses an electric field to control the shape and hence the conductivity of a channel of one type of charge carrier in a semiconductor material. Drain (D), through which the majority carriers leave the channel
Gate (G), the terminal that modulates the channel conductivity INDUCTORS IN
A CIRCUIT TYPES a passive two-terminal electrical component that stores energy in its magnetic field note! Any conductor has inductance Inductance (L) results from the magnetic field forming around a current-carrying conductor. AIR CORE INDUCTORS an inductor that does not use a magnetic core air core coils have lower inductance than ferromagnetic core coils often used at high frequencies because they are free from energy losses called core losses that occur in ferromagnetic cores MAGNETIC CORE INDUCTOR a coil of wire wound on a magnetic core with a high permeability used to confine and guide magnetic fields VARIABLE INDUCTOR (slug tuned coil) an inductor w/ core that can be moved in or out of the coil the GREATER core area, the GREATER inductance FACTORS: number of coils
kind of material (core)
cross-sectional area
length of the coil inductors can store energy in its magnetic field When you open the switch, the bulb burns very brightly and then quickly goes out when you close the switch, the bulb burns brightly and then gets dimmer. TRAFFIC LIGHT
SENSORS OSCILLATORS generates the radio frequencies w/c modulate the audio signals a semiconductor device used to amplify and switch electronic signals and electrical power it is composed of semiconductor material with at least three terminals for connection to an external circuit INDUCTORS as TRANSFORMERS NPN and PNP
IN A CIRCUIT Device that converts an alternating (A/C) current of a certain voltage to an alternating current of different voltage, without change of frequency, by electromagnetic induction A transformer changes the voltage of electricity (and has no moving parts). This allows electricity to be transmitted over long distances at high voltages, but safely used at a lower voltage. Diode is a two-terminal device that conducts current more easily in one direction. 3 categories: SIGNAL DIODE –when they are used in signal circuits RECTIFIER DIODE – when they are used for conversion of AC to DC REGULATOR DIODE – when they are used for controlling voltage 2 ELECTRODES: CATHODE – signifies the arrow head
ANODE- signifies the bar When the correct voltage polarity is applied, the diode conducts and it is a FORWARD BIAS When the polarity o voltage is incorrect, the diode acts as a very high resistance that does not allow conduction and it is a REVERSE BIAS LED (Light-Emitting Diode) a semiconductor light source a p-n device like a rectifier to indicate the flow of current as a FORWARD BIAS power ON indicator IMPORTANCE: very efficient in terms of saving energy and cost used as indicators in electronic devices, in flashlights and as car lights they provide environmental protection and come in many colors How Can a Diode Produce Light? A transistor used for amplifying or switching electronic signals is the metal-oxide-semiconductor field-effect transistor (MOSFET) Source (S), through which the majority carriers enter the channel_ ZENER DIODE aka voltage reference diodes ~semiconductor device very much like a rectifier diode but it can conduct a higher reverse current ~used as a VOLTAGE REGULATOR and connected across the circuit where a regulated voltage is required RECTIFIER DIODE Rectification is the conversion of alternating current (AC) to direct current (DC). used to convert AC to DC
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