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MindMap Gallery Analog Electronics Technology Semiconductor Transistors and Amplifier Circuits
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Analog Electronics Technology Semiconductor Transistors and Amplifier Circuits
Analog electronic technology semiconductor triode and amplifier circuit mind map (detailed), including related content of semiconductor triode (BJT), common emitter amplifier circuit, combination amplifier circuit, common collector circuit and common base circuit.
Edited at 2022-06-26 15:17:28- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- Project Management Process Template
Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
Analog Electronics Technology Semiconductor Transistors and Amplifier Circuits
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- Project Management Process Template
Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
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- Outline
Semiconductor transistors and amplifier circuits
Semiconductor triode (BJT)
Brief introduction to the structure of BJT
type
NPN type
PNP type
Structural features
The emitter region has the highest doping concentration
The doping concentration of the collector area is lower than that of the emitter area, and the area is large
The base area is very thin, generally from a few microns to dozens of microns, and has the lowest doping concentration.
BJT current distribution and amplification principle
achieve amplification
External conditions: emitter junction is forward biased, collector junction is reverse biased
Internal conditions: The impurity concentration in the emitter region is much greater than the impurity concentration in the base region, and the base region is very thin
Connection method: connection method consistent with three configurations
Internal carrier transfer process (taking NPN as an example)
Emission zone: Emitting carriers
Collector area: collects carriers
Base region: transporting and controlling carriers
Current distribution relationship (amplification state)
Three configurations
Common emitter connection (CE)
Common base connection (CB)
Common collector connection (CC)
Characteristic curve of BJT
Enter characteristic curve
Output characteristic curve
Effect of temperature on triode characteristic curve
Main parameters of BJT
common emitter amplifier circuit
basic concept
Voltage amplifier circuit
Current amplifier circuit
Transimpedance amplifier circuit
Mutual conductance amplifier circuit
Basic common emitter amplifier circuit
subtopic
Static: only DC signals are considered, that is, vi=0, the potential of each point remains unchanged (DC working state), represented by Q point
Dynamic: only AC signals are considered, that is, vi is not 0, and the potential of each point changes (AC working state)
DC path: no change in the circuit, capacitor → open circuit, inductor → short circuit
AC path: capacitor → short circuit in the circuit, inductor → open circuit, DC power supply short circuit to the common terminal
Main Specifications
DC operating values IB, IC, VCE
gain
Input resistance Ri
Output resistance Ro
Passband
Combination amplifier circuit
Common emitter-common base amplifier circuit
Common collector-common collector amplifier circuit
How to analyze amplifier circuits
Find the DC path of the circuit (AC signal source = 0) - find the Q point
Find the AC path of the circuit at intermediate frequency → draw the H parameter small signal model equivalent circuit
All capacitors are short circuited
DC power is equivalent to a short circuit to ground
Common collector circuit and common base circuit
common collector circuit
common base circuit
Three configurations of basic amplifier circuits
Discrimination between three configurations
The signal is input from the base and output from the collector - common emitter amplifier circuit
The signal is input from the base and output from the emitter - common collector amplifier circuit
The signal is input from the emitter and output from the collector - common base circuit
Main features of the three configurations
The problem of working point stability of amplifier circuit
Effect of temperature on operating point
Increased temperature will cause the static operating point to increase
Emitter bias circuit
Stable working point principle
If the potential at point b is basically unchanged when the temperature changes, the stability of the static operating point can be achieved.
Amplification circuit indicator analysis
Comparison of Fixed Bias Circuit and Emitter Bias Circuit
Small signal model analysis method (analysis of common emitter basic amplifier circuit)
Draw the DC path and calculate the static operating point Q
Calculate rbe
Draw communication pathways
Draw microvariant equivalent circuit
Calculate voltage amplification Av
Calculate input resistance Ri
Calculate the output resistance Ro
Amplification circuit analysis method
Static working situation analysis
Equivalent circuit method: approximate estimation
Determination of static operating point using graphic analysis method
Dynamic work situation analysis
Analyze dynamic work situations using diagrams
Equivalent circuit method: small signal model