Chapter 4 Bipolar Junction Transistors

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Chapter 4Bipolar Junction Transistors
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BJT I-V Relationships

• Ebers-Moll Model -Table 4.2
• Input and Output Characteristics
• SPICE parameters ----to I-V curvers
• Regions of Opertion
• Biasing the BJT
• Bias Stability
• Small Signal Models
• Single Transistor Amplifiers

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Output characteristics
B-E and C-B Junctions
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Forward Bias
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Ebers-Moll for computer/hand use 4.13
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Ebers-Moll for computer/hand use
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Example Using Table 4.2 Eqs
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SPICE Example to VERIFY Table 4.2
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Generating OTC Curves Ex 4.14 pp239
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Circuit Modeling of Regions
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Physical Base Currents
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Example Region chk 4.12
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Simple BJT Switch 4.12
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Operating and Biasing Constraints
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Fixed Biased Circuit pp236-54
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Temperature Effects and RE pp239
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Analysis of Transistor DC Bias
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Self Biased with RE
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Self Biased with RE
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Self Biased Example
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Example Cont
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Bias Stability
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Collector Current Variation
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Collector Current Variation
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Collector Current Variation
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Example
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PSPICE
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Small Signal Model pp 256
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Small Signal Model pp257
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Small Signal Model Gain pp259-60
See Ex 4.9 Application of ss models
?
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Application of Small Signal Model pp262
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Small Signal Model with Re pp285
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Small Signal Model with Re pp285
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Common Collector pp290
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Common Collector Cont
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Small Signal Model Cont Add Cs
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Small Signal Model Cuttoff f
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Small Signal Model Cuttoff f
See Fig 4.73 pp 325 also. This slide presents a
very key concept. In practice in broad band
amplifier design one CANNOT expect to apply a
transistor beyond ?T.
0 dB
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Small Signal Model EX 4.76This is what its is
about
Understand and know for exam!!!