#How to use resonance series

Let's say, for example, an alternating input signal is applied from the outside to the series resonant circuit that was calculated in Fig. If there is an unintended resonance in the electric circuit, the impedance significantly changes at the resonance frequency resulting in a large current or voltage, which can be a cause of noise interference. Issues of EMC measures for resonant circuit (1) Resonant circuit amplifies the voltage 3-2-3 Mechanism of making the impedance minimum due to series resonanceДЈ-2-2. 3-2-2, a series resonance makes the impedance minimum (ideally zero), while a parallel resonance makes it maximum (ideallyДЇig. As shown in the calculation example of Fig. 3-2-1, there are two types of resonant circuit: series resonance and parallel resonance. apart from the above, we only focus on LC resonance by inductor and capacitor).ДЄs shown in Fig. (Although a resonance in association with EMC can be caused by antenna, parallel plates and transmission line, etc.

Resonance means that the inductive reactance and capacitive reactance in a circuit cancel with each other at a certain frequency, and the specific frequency is called 'resonance frequency.' Although the typical parts that can generate a reactance (imaginary component of impedance) include inductors (coils) and capacitors, any other parts (even a simple wire) can be an element of resonance as those still contain a very small reactance. Parallel resonance and series resonance (1) LC resonant circuit This section will describe resonance and damping resistors.ДЈ-2-1. In order to suppress resonance, damping resistors are used. It is important to eliminate resonance from the circuit as much as possible. If a circuit contains an unintended resonant circuit, it generates a very large current or voltage at the resonance frequency making it more likely to cause noise interference. Resonance is one of the important factors when causing noise or receiving a noise induction. 3-1-1 Contents to be explained in Chapter 3 Therefore, this chapter will explain these terms (try to use the least number of formulas possible) as well as introducing important topics regarding noise such as resonance and damping, noise conduction and reflection, and source impedance.ДЇig. Without understanding these terms, you cannot handle the noise issues. However, in order to explain the mechanism of noise transmission and emission, you need terms that are used for the transmission theory, electromagnetics and antenna theory as shown in Fig. So far, the noise occurrence has been explained with relatively simple expressions (except for harmonics). This chapter particularly describes the transmission lines among these. In order to handle the noise interference for electronic devices, you need to understand not only the noise source origin, but also the characteristics of the transmission lines and antennas. Chapter 2 has described the mechanism of causing electromagnetic noise and, among others, particularly described the noise that is generated from digital circuits in detail.

How to use resonance