# Chapter 5 Transistor Bias Circuit - PowerPoint PPT Presentation

Title: Chapter 5 Transistor Bias Circuit

1
Chapter 5 Transistor Bias Circuit
2
DC Bias
• Bias establishes the dc operating point (Q-point)
for proper linear operation of an amplifier.

3
Collector Characteristic Curves
4
5
Operating Point (Q points)
6
Linear Operation
7
Symbol
• Only DC Quantaties
• VBE
• Coupled AC Quantaties

• Vbe

Upper case
Upper case subscription
Upper case
lower case subscription
8
Linear Operation
9
Calculate Q points
• Calculate
• Assumption when calculate Q -points

10
Emitter Bias
11
Base Bias
12
Emitter-Feedback Bias
Base Bias
Emitter Feedback Bias
13
Emitter Feedback Bias
14
Collector Feedback Bias
Base Bias
Collector Feedback Bias
15
Collector Feedback Bias
16
Voltage Divider Bias
17
Voltage Divider Bias
18
Voltage Divider Bias
19
Voltage Divider Bias
20
Voltage Divider Bias
• Stiff voltage divide

Stiff
Stiff
Criterion for Stiff
21
Stiff Voltage Divider Bias
22
Voltage Divider Bias
• Procedure for analyze voltage divider bias
• Check stiffness
• If Stiff
else

• Thevenin equivalent
circuit
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## Chapter 5 Transistor Bias Circuit

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### Chapter 5 Transistor Bias Circuit DC Bias Bias establishes the dc operating point (Q-point) for proper linear operation of an amplifier. Collector Characteristic ... – PowerPoint PPT presentation

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Title: Chapter 5 Transistor Bias Circuit

1
Chapter 5 Transistor Bias Circuit
2
DC Bias
• Bias establishes the dc operating point (Q-point)
for proper linear operation of an amplifier.

3
Collector Characteristic Curves
4
5
Operating Point (Q points)
6
Linear Operation
7
Symbol
• Only DC Quantaties
• VBE
• Coupled AC Quantaties

• Vbe

Upper case
Upper case subscription
Upper case
lower case subscription
8
Linear Operation
9
Calculate Q points
• Calculate
• Assumption when calculate Q -points

10
Emitter Bias
11
Base Bias
12
Emitter-Feedback Bias
Base Bias
Emitter Feedback Bias
13
Emitter Feedback Bias
14
Collector Feedback Bias
Base Bias
Collector Feedback Bias
15
Collector Feedback Bias
16
Voltage Divider Bias
17
Voltage Divider Bias
18
Voltage Divider Bias
19
Voltage Divider Bias
20
Voltage Divider Bias
• Stiff voltage divide

Stiff
Stiff
Criterion for Stiff
21
Stiff Voltage Divider Bias
22
Voltage Divider Bias
• Procedure for analyze voltage divider bias
• Check stiffness
• If Stiff
else

• Thevenin equivalent
circuit