Second Class - Uoanbar.edu.iq
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabSecond ClassChapter 4 : DC Biasing – BJTsLec04 p1Munther N. Thiyab2019-2020
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabBiasingBiasing: The DC voltages applied to a transistor inorder to turn it on so that it can amplify the AC signal.Recall the following basic relationships for a transistor:V BE 0.7 VIE( 1)I IC I 1
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabOperating PointThe DC inputestablishes anoperating orquiescent pointcalled the Q-point.Various operating points within thelimits of operation of a transistor.2
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabThe Three States of Operation Active or Linear Region OperationBase–Emitter junction is forward biasedBase–Collector junction is reverse biased Cutoff Region OperationBase–Emitter junction is reverse biased Saturation Region OperationBase–Emitter junction is forward biasedBase–Collector junction is forward biased3
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabDC Biasing Circuits Fixed-bias circuitEmitter-stabilized bias circuitCollector-emitter loopVoltage divider bias circuitDC bias with voltage feedback4
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabFixed Bias configuration5
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabFixed Bias configurationFixed bias circuitDC equivalent6
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabThe Base-Emitter LoopFrom Kirchhoff’s voltagelaw: VCC – IBRB – VBE 0Solving for base current:VCC VBEIB RB7
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabCollector-Emitter LoopCollector current:I C I BFrom Kirchhoff’s voltage law:VCE VCC I C R C8
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabExample 4.1Find IBQ , ICQ , VCEQ , VB, VC , VBC.9
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisV CE V CC I C RC10
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisV CE V CC I C RCV CE V CCV CCIC RCI C 0 mAV CE 0V11
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisMovement of the Q-point with increasing level of IB.(The level of IB is changed by varying the value of RB)12
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisEffect of an increasing level of RC on the load line and the Q-point.(VCC fixed)13
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisEffect of lower values of VCC on the load line and the Q-point.14
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabExample 4.3Find VCC , RC , RB forthe fixed biasingconfiguration15
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabEmitter-Stabilized Bias CircuitAdding a resistor(RE) to the emittercircuit stabilizes thebias circuit.16
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabBase-Emitter LoopFrom Kirchhoff’s voltage law: VCC - I E R E - VBE - I E R E 0Since IE ( 1)IB:VCC - I B R B - ( 1)I B R E 0Solving for IB:IB VCC - VBER B ( 1)R E17
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabCollector-Emitter LoopFrom Kirchhoff’s voltage law:I R V I R V 0E ECE C CCCSince IE IC:VCE VCC – I C (R C R E )Also:VE I E R EVC VCE VE VCC - I C R CVB VCC – I R R B VBE VE18
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabExample 4.4Find IB , IC , VCE , VC , VE , VB , VBC .19
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabImproved Biased StabilityStability refers to a circuit condition in which thecurrents and voltages will remain fairly constant overa wide range of temperatures and transistor Beta ( )values.Adding RE to the emitter improves the stability of a transistor.20
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabImproved Biased Stability21
University of AnbarCollege of EngineeringDept. of Electrical EngineeringFundumental of Electronic IMsc: Munther Naif ThiyabLoad Line AnalysisV CE V CC I C (RC R EV CE V CCI C 0 mAV CCIC R REV CE 0V22
Chapter 4 : DC Biasing - BJTs Lec04_p1 Munther N. Thiyab 2019-2020. 1 University of Anbar College of Engineering Dept. of Electrical Engineering Fundumental of Electronic I Msc: Munther Naif Thiyab Biasing Biasing: The DC voltages applied to a transistor in order to turn it on so that it can amplify the AC signal.
SPURGEON,JOLENE M JSPURGEON@WISC.EDU STRELCHENKO,HANNAH B hstrelchenko@wisc.edu TERRIEN,CHRISTINE LAMP cterrien@wisc.edu THOMPSON,PAMELA M pamela.thompson@wisc.edu TOMAN,LORRAINE L lorraine.toman@wisc.edu TOMKO,KELLY ktomko@wisc.edu VANDER WAAL,MARY mary.vanderwaal@wisc.edu WHITE,JOANNE jo.white@wisc.edu WILSON,NINA MCCOY nina.wilson@wisc.edu .
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hydrochloride transforms into alpha form. Light. e.g. Sodium nitroprusside, nifedipine This chapter studies the rates and mechanisms of reactions specially the decomposition and stabilization of drug products. For example, thiamine hydrochloride is most s
bottom) and all the simple beams between. In Figure 5.9b, these reactions are A, B1, B2, C1, C2, and D. Step 3. The strut loads in the figure may be calculated via the formulas (5.8) where PA , PB, PC, PD loads to be taken by th
Questions 13 2. ELEMENTARY ECONOMIC ANALYSIS 15-25 2.1 Introduction 15 2.2 Examples for Simple Economic Analysis 16 2.2.1 Material Selection for a Product/Substitution of Raw Material 16 2.2.2 Design Selection for a Product 18 2.2.3 Building Material Selection 21 2.2.4 Process Planning/Process Modification 22 Questions 24 3.
Organic Chemistry Chapter 1 General Introduction . 2 Organic Chemistry Organic chemistry is the chemistry of the compounds of carbon. Inorganic compounds are those obtained from minerals, while organic compounds are those obtained from vegetable or animal sources, that is, from material produced by living .
Types of Column Chromatography: 1. Adsorption column chromatography - Adsorption chromatography is a technique of separation, in which the components of the mixture are adsorbed on the surface of the adsorbent. 2. Partition column chromatography - The stationary phase, as well as mobile phase, are liquid in partition .
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