Electronic technology promotes computer technology and various fields, such as applications in communications, industry, transportation, military, medicine, consumer electronics, etc.

The development history of electronic components, the evolution from electron tubes to semiconductor tubes to integrated circuits, as well as important inventions and inventors at each stage.

Signal classification: Understand the discrete nature of digital signals and the continuity of analog signals, and know that most physical quantities are analog signals.

The definition and function of analog circuits: To process analog signals, the most basic processing is signal amplification. Most other analog circuits are based on amplification circuits.

Including analog electronic circuits, digital electronic circuits (systems), sensor receivers, etc., as well as the functions and interrelationships of each part.

Understand the signal transmission and processing process in the system, such as isolation, filtering, amplification, calculation, conversion, comparison, power amplifier, etc.

Engineering: Emphasis on qualitative analysis, allowing for a certain error range on the premise of meeting basic performance indicators. Quantitative analysis is "estimation", focusing on the main contradictions and main aspects of the contradiction, and constructing different equivalent models under different conditions.

Practicality: Master the use of commonly used electronic instruments, testing methods of electronic circuits, fault judgment and troubleshooting methods, and application methods of EDA software.

Learning methods: Master basic concepts, basic circuits and basic analysis methods, pay attention to the importance of qualitative analysis and approximate analysis, learn to dialectically and comprehensively analyze problems in electronic circuits, and pay attention to the application of commonly used theorems in circuits.

Course Purpose: Master basic knowledge, theories and skills, have the ability to continue learning and accept new developments in electronic technology, apply the learned knowledge to the major, and cultivate systematic concepts, engineering concepts, scientific and technological progress concepts and innovative consciousness.

Intrinsic semiconductor: A pure semiconductor with a crystal structure. Its conductivity is between that of a conductor and an insulator. Understand the structure of intrinsic semiconductors, the generation and recombination of carriers, the relationship between carrier concentration and temperature, etc.

Impurity semiconductors: divided into n-type semiconductors (doped with pentavalent elements such as phosphorus) and p-type semiconductors (doped with trivalent elements such as boron). Master the majority carriers and minority carriers, conductivity and impurity concentration, etc.

The formation of PN junction and its one-way conductivity: Understand the formation process of PN junction, including diffusion movement, generation of internal electric field, drift movement and establishment of dynamic equilibrium; master the one-way conductivity of PN junction, conduction when forward biased Pass, cut off when reverse biased.

Capacitance effect of PN junction: Understand the concepts of barrier capacitance and diffusion capacitance and their causes.

Voltage-ampere characteristics of diodes: Master the forward characteristics (turn-on voltage, conduction voltage), reverse characteristics (reverse saturation current, reverse breakdown voltage) of diodes, as well as the effect of temperature on volt-ampere characteristics.

The main parameters of the diode: such as maximum rectified current, maximum reverse operating voltage, reverse current, maximum operating frequency, etc. Understand the meaning of these parameters and their impact on diode performance.

Applications of diodes: including applications in circuits such as rectification, limiting, voltage stabilization, etc., and the ability to analyze simple diode circuits.

Structure and types of triodes: Understand the basic structure and working principle of triodes, as well as the differences between NPN and PNP triodes.

The current amplification effect of triodes: Master the current distribution relationship of triodes and understand the concept of current amplification.

The characteristic curve of the transistor: including the input characteristic curve and the output characteristic curve, and understanding the characteristics and conditions of each area (cutoff area, amplification area, saturation area).

The main parameters of the triode: such as DC current amplification, AC current amplification, penetration current, maximum allowable collector current, collector-emitter reverse breakdown voltage, etc. Understand the meaning of these parameters and their impact on the performance of the triode.

The composition of the circuit: including transistor, DC power supply, bias resistor, coupling capacitor, load resistor and other components, and understand the role of each component.

Working principle: Analyze the role of DC bias to make the triode work in the amplification area; understand the signal amplification process, including the coupling of the input signal, the current amplification of the triode, the coupling of the output signal, etc.

DC analysis: Calculate static operating points (IB, IC, UCE), master estimation methods and graphical methods.

AC analysis: Analyze AC signal amplification, input resistance, output resistance and other performance indicators, and master small signal model analysis and graphical methods.

The impact of temperature on the static operating point: Understand the impact of temperature rise on the transistor parameters, and how to stabilize the static operating point, such as introducing DC negative feedback, using temperature compensation and other methods.

Common emitter amplifier circuit: It has high voltage amplification factor and current amplification factor, moderate input resistance and output resistance, and is widely used.

Common amplifier circuit: The voltage amplification factor is close to 1, but it has higher input resistance and lower output resistance. It is often used in the input stage, output stage and buffer stage of signals.

Common base amplifier circuit: It has higher frequency response and better phase characteristics, and is often used in high-frequency circuits and wide-band amplifier circuits.

Structure and characteristics of integrated operational amplifier: Understand the basic structure of integrated operational amplifier, including input stage, intermediate stage, output stage and bias circuit, as well as the characteristics of integrated operational amplifier, such as high gain, high input resistance and low output resistance. , high common mode rejection ratio, etc.

The main parameters of integrated operational amplifiers: such as open-loop gain, input offset voltage, input offset current, common mode rejection ratio, bandwidth, etc. Understand the meaning of these parameters and their impact on the performance of integrated operational amplifiers.

The conditions of an ideal operational amplifier: infinite input resistance, zero output resistance, infinite open-loop gain, etc.

The concepts of virtual short and virtual break: Under the conditions of ideal op amp, derive the conclusion of virtual short and virtual break, and master the method of analyzing the op amp circuit using virtual short and virtual break.

Proportional arithmetic circuits: including inverting proportional arithmetic circuits and non-phase proportional arithmetic circuits. Master their circuit structures, working principles and arithmetic relationships.

Addition circuit: Understand the implementation methods and operational relationships of inverting addition circuits and non-inverting addition circuits.

Subtraction operation circuit: Master the principle and analysis method of differential amplifier circuit to realize subtraction operation.

Integral operation circuit and differential operation circuit: Understand their circuit structure and working principle, as well as their application in signal processing.

Definition of feedback: Understand the concept of feedback, that is, the output signal is sent back to the input end through a certain channel, affecting the input signal.

Classification of feedback: According to the nature of the feedback signal, it is divided into DC feedback and AC feedback; according to the connection method between the feedback signal and the input signal, it is divided into series feedback and parallel feedback; according to the impact of the feedback signal on the net input signal, it is divided into positive feedback and negative feedback .

The circuit structure, characteristics and performance indicators of voltage series negative feedback, voltage parallel negative feedback, current series negative feedback and current parallel negative feedback, and master the method of judging feedback configuration.

Improve the stability of the amplification factor, change the input and output resistance, broaden the frequency band, reduce nonlinear distortion, etc., and understand the principles and practical significance of these effects.

Magnification estimation under deep negative feedback conditions

Master the method of estimating the magnification factor using the concepts of virtual short and virtual short under the condition of deep negative feedback.

The concept and classification of filters: Understand the function of filters, which is to select the frequency of the signal, and are divided into low-pass filters, high-pass filters, band-pass filters and band-stop filters.

Structure and working principle of active filters: Master the basic structure of active filters, including operational amplifiers and passive components (resistors, capacitors), and understand their working principles and frequency response characteristics.

Filter performance parameters: such as passband gain, cutoff frequency, bandwidth, quality factor, etc. Understand the meaning of these parameters and their impact on filter performance.

The function of the voltage comparator: compares the magnitude of two input voltages and outputs high level or low level.

The circuit structure, working principle and transmission characteristics of simple voltage comparators and hysteresis comparators, and master their analysis methods and applications.

Rectangular wave generating circuit: Understand the basic structure and working principle of the rectangular wave generating circuit, and master the calculation method of its oscillation frequency and duty cycle.

Triangular wave generating circuit: Understand the generating principle and circuit structure of the triangular wave generating circuit, and master the characteristics of its output waveform and the frequency adjustment method.

Sawtooth wave generating circuit: Know the working principle and application of sawtooth wave generating circuit.

Basic requirements: high output power, high efficiency, small nonlinear distortion, good heat dissipation performance, etc.

Classification: According to the working status of the power amplifier tube, it is divided into Class A, Class B, and Class A and B power amplifier circuits. Understand the characteristics and applications of each type.

Class B dual power supply complementary symmetrical power amplifier circuit

Circuit structure and working principle: Master the composition and working principle of the OCL circuit, and understand the calculation method of its output power and efficiency.

Crossover distortion and its overcoming methods: Understand the causes of crossover distortion and master measures to overcome crossover distortion, such as adopting Class A and B working conditions.

Circuit structure and working principle: Understand the composition and working principle of the OTL circuit, and master the estimation method of its output power and efficiency.

The role of the bootstrap circuit: Understand the role of the bootstrap circuit in the OTL circuit to increase the amplitude of the output voltage.

DC power supply generally consists of transformer, rectifier circuit, filter circuit, voltage stabilizing circuit and other parts. Understand the functions and functions of each part.

Understand the circuit structure, working principle and output waveform of half-wave rectifier circuit, full-wave rectifier circuit and bridge rectifier circuit, and master the calculation methods of their rectified voltage and rectified current.

Understand the working principles and characteristics of capacitor filter circuits, inductor filter circuits, and complex filter circuits, and understand their smoothing and filtering effects on the output voltage.

Zener tube voltage stabilizing circuit: Master the analysis method of its circuit structure, working principle and voltage stabilizing performance.

Series voltage stabilizing circuit: Understand its basic structure and working principle, master the adjustment range of the output voltage and the calculation method of the voltage stabilizing coefficient.

Integrated voltage regulator: Be familiar with the models and applications of commonly used integrated voltage regulators, such as three-terminal voltage regulators, etc.