Four common methods of analyzing circuits (I)

The electronic circuit diagram is used to indicate the composition, structure, and nominal value of the actual electronic circuit. The actual circuit can be known through the circuit diagram. In this way, when we analyze the circuit, we don't have to turn the object over and over, just hold a drawing. When designing the circuit, it can also be carried out on the paper or on the computer. After confirming the improvement, the actual installation is carried out, and the debugging and improvement are carried out until success. We can also use advanced computer software to carry out circuit-assisted design, and even perform virtual circuit experiments, greatly improving work efficiency.

I summed up the four commonly used methods of analyzing circuits, as well as the circuit types and analysis steps that are appropriate for each method.

1. Time constant analysis

The time constant analysis method is mainly used to analyze the properties of the circuit composed of R, L, C and semiconductor diodes. The time constant is a parameter reflecting the speed of energy accumulation on the energy storage element. If the time constant is different, although the form and connection of the circuit are similar, But the role played in the circuit is different. Commonly there are coupling circuits, differential circuits, integration circuits, clamp circuits and peak detection circuits.

2. Frequency characteristic analysis

The frequency characteristic analysis method is mainly used to analyze whether the frequency of the circuit itself is compatible with the frequency of the signal it processes. In the analysis, it should be simple to calculate its center frequency, upper and lower limit frequency and bandwidth. Through this analysis, the properties of the circuit, such as filtering, notching, resonance, frequency selection circuits, etc., can be known.