Download - BJT Transistors and Characteristics
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BJT Transistors and Characteristics
ELEC 121
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January 2004 ELEC 121 2
Introduction to BJT’s• Introduction to BJT’s• BJT Specification Sheets• BJT Characteristic Family of Curves• BJT Circuit Simulation – DC Bias• BJT Bias Circuits
– Fixed-Bias Circuit– Emitter-Stabilized Bias Circuit– Collector-Emitter Loop– Voltage Divider Bias Circuit– DC Bias with Voltage Feedback– Miscellaneous Bias Circuits
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January 2004 ELEC 121 3
The NPN BJT
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January 2004 ELEC 121 4
NPN Biasing
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January 2004 ELEC 121 5
Example of Transistor Bias
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January 2004 ELEC 121 6
Input Characteristics of a Common-Base Amp
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January 2004 ELEC 121 7
Output Characteristics of a Common-Base Amp
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January 2004 ELEC 121 8
Voltage Gain in a PNP Transistor
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January 2004 ELEC 121 9
NPN CE Amplifier Characteristics
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January 2004 ELEC 121 10
Transistor Specifications
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January 2004 ELEC 121 11
Circuit to display Characteristic Curves
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January 2004 ELEC 121 12
Collector Characteristic Curves
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January 2004 ELEC 121 13
Common-emitter characteristics displaying exaggerated secondary effects
Characteristic Curves Secondary Effects
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January 2004 ELEC 121 14
Maximum Power Curve for BJT
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January 2004 ELEC 121 15
PNP Transistor
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January 2004 ELEC 121 16
PNP Characteristics
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January 2004 ELEC 121 17
PSpice Simulation for Family of Curves
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January 2004 ELEC 121 18
DC Sweep Primary Sweep
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January 2004 ELEC 121 19
DC Sweep Secondary Sweep
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January 2004 ELEC 121 20
Probe Output for Family of Curves