Circuit engineers, master these 15 basic analog circuits before starting!

 1. Bridge rectifier circuit

1. Unidirectional conductivity of diode:

2. Bridge rectifier current flow process:

Input and output waveforms

3. Calculate: Vo, Io, diode reverse voltage.

2. Power filter

1. Process analysis of power supply filtering:

Waveform formation process:

2. Calculation: Selection of the capacity and withstand voltage value of the filter capacitor.

3. Signal filter

1. The function of signal filter:

Differences and similarities with power filters:

2. Impedance calculation of LC series and parallel circuits, amplitude-frequency relationship and phase-frequency relationship curve.

3. Draw the passband curve. Calculate the resonant frequency.

4. Differential and Integral Circuits

1. The function of the circuit, the differences and similarities with the filter.

2. Analyze the voltage change process of differential and integral circuits and draw voltage change waveform diagrams.

3. Calculation: time constant, voltage change equation, selection of resistance and capacitance parameters.

5. Common emitter amplifier circuit

1. The structure of the triode, the current relationship between each pole of the triode, the characteristic curve, and the amplification conditions.

2. The role of components, the purpose of the circuit, voltage amplification factor, input and output signal voltage phase relationship, AC and DC equivalent circuit diagrams.

3. Calculation of static operating point and voltage amplification factor.

6. Voltage-biased common-emitter amplifier circuit

1. The role of components, the purpose of the circuit, voltage amplification factor, input and output signal voltage phase relationship, AC and DC equivalent circuit diagrams.

2. Analysis of the current series negative feedback process and the impact of negative feedback on circuit parameters.

3. Calculation of static operating point and voltage amplification factor.

4. Controlled source equivalent circuit analysis.

7. Common collector amplifier circuit (emitter follower)

1. The role of components, the purpose of the circuit, voltage amplification factor, input and output signal voltage phase relationship, AC and DC equivalent circuit diagrams. Input and output impedance characteristics of the circuit.

2. Analysis of the current series negative feedback process and the impact of negative feedback on circuit parameters.

3. Calculation of static operating point and voltage amplification factor.

8. Circuit feedback block diagram

1. The concept of feedback, positive and negative feedback and their judgment methods, parallel feedback and series feedback and their judgment methods, current feedback and voltage feedback and their judgment methods.

2. Amplification gain with negative feedback circuit.

3. The impact of negative feedback on the amplification gain, passband, gain stability, distortion, input and output resistance of the circuit.

9. Diode voltage stabilizing circuit

1. Characteristic curve of Zener diode.

2. Things to note when applying Zener diodes.

3. Analysis of voltage stabilization process.

10. Series regulated power supply

1. Block diagram of series regulated power supply.

2. The role of each component; analysis of the voltage stabilization process.

3. Output voltage calculation.

11. Differential amplifier circuit

1. The function of each component of the circuit, the purpose of the circuit, and the characteristics of the circuit.

2. Analysis of the working principle of the circuit. How to amplify differential mode signals and suppress common mode signals.

3. Single-ended input and double-ended input, single-ended output and double-ended output working modes of the circuit.

12. Field effect tube amplifier circuit

1. The working characteristics of field effect tubes and the characteristics of field effect amplifiers. The function of each component.

2. Analysis of the amplification process.

3. Calculation of voltage amplification gain.

13. Frequency Selective (Bandpass) Amplification Circuit

1. The function of each component:

Characteristics of frequency selective amplifier circuit and function of the circuit.

2. Calculation of characteristic frequencies and selection of frequency selection component parameters.

3. Amplitude-frequency characteristic curve:

14. Operational amplifier circuit

15. Differential input operational amplifier circuit

1. Characteristics and uses of differential input operational amplifier circuits

2. The relationship between the output signal voltage and the input signal voltage