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Chapter 4 Bipolar Junction Transistors

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Bipolar Junction Transistors ... Ensure Transistor CKT will work over the range of specified voltage, tempertature, and transistor variation. – PowerPoint PPT presentation

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Title: Chapter 4 Bipolar Junction Transistors


1
Chapter 4Bipolar Junction Transistors
2
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

3
Output characteristics
B-E and C-B Junctions
4
Forward Bias
5
Ebers-Moll for computer/hand use 4.13
6
Ebers-Moll for computer/hand use
7
Example Using Table 4.2 Eqs
8
SPICE Example to VERIFY Table 4.2
9
Generating OTC Curves Ex 4.14 pp239
10
Circuit Modeling of Regions
11
Physical Base Currents
12
Example Region chk 4.12
13
Simple BJT Switch 4.12
14
Operating and Biasing Constraints
15
Fixed Biased Circuit pp236-54
16
Temperature Effects and RE pp239
17
Analysis of Transistor DC Bias
18
Self Biased with RE
19
Self Biased with RE
20
Self Biased Example
21
Example Cont
22
Bias Stability
23
Collector Current Variation
24
Collector Current Variation
25
Collector Current Variation
26
Example
27
PSPICE
28
Small Signal Model pp 256
29
Small Signal Model pp257
30
Small Signal Model Gain pp259-60
See Ex 4.9 Application of ss models
?
31
Application of Small Signal Model pp262
32
Small Signal Model with Re pp285
33
Small Signal Model with Re pp285
34
Common Collector pp290
35
Common Collector Cont
36
Small Signal Model Cont Add Cs
37
Small Signal Model Cuttoff f
38
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
39
Small Signal Model EX 4.76This is what its is
about
Understand and know for exam!!!
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