ELET 3720 CHAPTER 4

ELET 3720 CHAPTER 4 - characteristic curves with the...

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1 CHAPTER 4 Bipolar Junction Transistors (BJT)
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2 Chapter 4 Homework 4-1, 4-2, 4-7, 4-8, 4-9, 4-12, 4-23, 4-25, 4-27,4-28
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3 BJT - 3 Terminals
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4 Biasing the two pn junctions in an npn transistor
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5 The npn transistor with both bias sources connected
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6 Equivalent npn transistor diagrams
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7
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8 Equivalent pnp transistor diagrams
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9 I CBO is the collector current that flows when the emitter is open
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10 Input and output voltages in npn and pnp common-base transistors
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11 Common-base input characteristics ( npn )
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12
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13 Common-base output characteristics (npn). Note that the negative V CB scale is expanded
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14 Common-emitter (CE) bias arrangements
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15 Input and output voltages and currents for npn and pnp transistors in the CE configuration
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16 Collector-emitter leakage current I CEO
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17 Common-emitter input characteristics
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18 The input to an npn transistor in the CE configuration can be regarded as a forward-biased diode having a fixed voltage drop
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19
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20 V CE V CB + 0.7 V for silicon. When V CE is reduced to about 0.7 V, then V CB ≈ 0 and the collector-base junction is no longer reverse biased
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21 The Early voltage, V A , is the intersection of the
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Unformatted text preview: characteristic curves with the horizontal axis 22 The common-collector ( CC ) bias configuration 23 Input and output voltages and currents in the CC configuration 24 Common-collector input characteristics 25 Common-collector output characteristics 26 27 28 Practical CB bias circuits 29 Load Lines 30 Load line plotted on CB output characteristics. The bias point (or quiescent point, labeled Q) is the intersection of the load line with the I E = 2 mA curve. 31 32 33 34 35 Common-collector bias circuits 36 37 CHAPTER 4 REVIEW 38 Common Base Circuit (Equations are for npn circuits. For npn circuits, use absolute values for V EB , V CB , and V CC ) 39 Common Emitter Circuit (Equations are for npn circuits.) 40 Common Collector Circuit (Equations are for npn circuits. For npn circuits, use absolute values for V EB , V CB , and V CC ) 41 Common Base Circuit 42 I c = (-1/R c )V CB +V CC / R C 43 Draw the load line for this circuit 44 CE load line for the bias circuit 45 Common Emitter Circuit...
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ELET 3720 CHAPTER 4 - characteristic curves with the...

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