10 Analog Circuits That Electronic People Must Master

1. 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. The circuit’s single-ended input and double-ended input, single-ended output and double-ended output working modes.

2. Field effect tube amplifier circuit

1. The classification, characteristics, structure, transfer characteristics and output characteristic curve of field effect transistors.

2. Characteristics of field effect amplifier circuit.

3. Application occasions of field effect amplifier circuit.

3. Frequency-selective (bandpass) amplification circuit

1. The function of each component:

Features of frequency selective amplifier circuit:

The function of the circuit:

2. Calculation of characteristic frequency:

Selection of frequency selection component parameters:

3. Amplitude-frequency characteristic curve:

4. Operational amplifier circuit

1. The concept of ideal operational amplifier:

The input terminal of the op amp is virtually short-circuited:

Virtual circuit break at the input of the op amp:

2. The main uses of the inverting input mode op amp circuit:

The phase relationship between the input voltage and the output voltage signal is:

3. The gain expressions in the non-inverting input mode are:

The input impedances are:

The output impedances are:

5. Differential input operational amplifier circuit

1. Characteristics of differential input operational amplifier circuit:

use:

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

6. Voltage comparison circuit

1. The function of voltage comparator:

The working process is:

2. Input-output characteristic curve of the comparator:

3. How to construct a hysteresis comparator:

7. RC oscillation circuit

1. Composition of oscillation circuit:

The function of the oscillator circuit:

Phase conditions for the oscillation of the oscillator circuit:

Oscillation circuit start-up and balance amplitude conditions:

2. The relationship curve between RC circuit impedance and frequency:

Phase versus frequency curve:

3. Analysis of phase conditions of RC oscillation circuit:

Oscillation frequency:

How to choose components:

8. LC oscillation circuit

1. Analysis of oscillation phase conditions:

2. DC equivalent circuit diagram and AC equivalent circuit diagram:

3. Calculation of oscillation frequency:

9. Quartz crystal oscillator circuit

1. Characteristics of quartz crystal:

Equivalent circuit of quartz crystal:

Characteristic curve of quartz crystal:

2. Characteristics of quartz vibrator:

3. Oscillation frequency of quartz crystal oscillator:

10. Power amplifier circuit

1. Working process of Class B power amplifier:

Crossover distortion:

2. Composite rules for composite transistors:

3. Analysis of the working principle of Class A and B power amplifiers:

Bootstrap process analysis:

Characteristics of Class A power amplifiers:

Characteristics of Class A and B power amplifiers: