common base (cb)
DESCRIPTION
Common Base (CB). Input & Output Characteristics. Engr.Usman Ali Khan. Contents. CB, CE and CC CB Circuit CB Input Characteristics CB Output Characteristics. BJT Configurations. Common Base (CB) Common Emitter (CE) Common Collector (CC). Common Base (CB). E. C. Input. Output. B. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/1.jpg)
Input & Output Characteristics
COMMON BASE (CB)
Engr.Usman Ali Khan
![Page 2: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/2.jpg)
CONTENTS
1. CB, CE and CC
2. CB Circuit
3. CB Input Characteristics
4. CB Output Characteristics
![Page 3: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/3.jpg)
BJT CONFIGURATIONS• Common Base (CB)
• Common Emitter (CE)
• Common Collector (CC)
![Page 4: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/4.jpg)
COMMON BASE (CB)
Input Output
B
E C
Base is common both to input signal and output signal
![Page 5: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/5.jpg)
COMMON EMITTER (CE)
Emitter is common both to input signal and output signal
Input
Output
E
C
B
![Page 6: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/6.jpg)
COMMON COLLECTOR (CC)
Collector is common both to input signal and output signal
Input
Output
E
C
B
![Page 7: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/7.jpg)
CB VOLTAGES AND CURRENTS
E
C
B
E
C
B
NPN PNP
IB
IE
IC
IB
IE
IC
VBE = 0.7 VEB = 0.7
VBE = -VEB
![Page 8: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/8.jpg)
CB INPUT CHARACTERISTICS
B
E C
VBE
IE
VBC
IC
Input SideOutput Side
To observe the behavior of Base-Emitter junction when VBC is fixed
![Page 9: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/9.jpg)
CB INPUT CHARACTERISTICS
VBE
IE
VCB = 0VVCB = 10V
VCB = 25V
0.7
![Page 10: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/10.jpg)
CB OUTPUT CHARACTERISTICS
B
E C
VBE
IE
VBC
IC
Input SideOutput Side
To observe the behavior of Base-Collector junction when IE is fixed
![Page 11: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/11.jpg)
CB OUTPUT CHARACTERISTICS
VBC
IC
-1 0 5 10
IE = 1mA
IE = 2mA
IE = 3mA
IE = 4mA
Saturation Region
Active Region
Junction Forward Biased Junction
Reverse Biased
Break down Region or Punch Through Region (Depletion Regions Overlap)
![Page 12: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/12.jpg)
HOME WORK• Example: 4.2, 4.3
• End Problems: 4.6 4.7
![Page 13: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/13.jpg)
Input & Output Characteristics
COMMON EMITTER (CE)
![Page 14: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/14.jpg)
CONTENTS
1. β
2. CE Configuration
3. CE Input Characteristics
4. CE Output Characteristics
![Page 15: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/15.jpg)
CE CONFIGURATION
InputE
C
B
Output
VCE
VCB
VBE
IB
IE
ICIE = IC + IB
VCE = VCB + VBE
VCE = VCB + 0.7
Input Current = IB
Input Voltage = VBE
Output Current = IC
Output Voltage = VCE
![Page 16: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/16.jpg)
B
C
BC
CBOBC
CBOBC
CBOBC
BCECBOC
ECBOC
CBOEC
EINJC
CBOINJCC
I
I
II
III
III
III
IIIII
III
III
II
III
1
11
1
1
1
11
)(
)(
IC = 1mAIB = 10 µAβ =?
![Page 17: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/17.jpg)
CE INPUT CHARACTERISTICS
VBE
IB
VCE = 20V
VCE = 10V
0.7
![Page 18: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/18.jpg)
CE OUTPUT CHARACTERISTICS
VCE
IC
5 10 15 20
IB = 10 µA
IB = 20 µ A
IB = 30 µ A
IB = 40 µ A
Saturation Region
Active Region
Junction Reverse Biased
Break down Region or Punch Through Region (Depletion Regions Overlap)
![Page 19: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/19.jpg)
HOME WORK• CC Characteristics
• Example: 4.4 4.6
• End Problems: 4.8 4.17
![Page 20: Common Base (CB)](https://reader036.vdocument.in/reader036/viewer/2022062309/568143a5550346895db02935/html5/thumbnails/20.jpg)
HOME TASK
• Make CC(Common Collector) Configuration and draw input output characteristics…