Media Basics of Noise Countermeasures Lesson 13: Using Common Mode Choke Coils for Signal Lines | Murata Manufacturing Articles
 
 

Basics of Noise Countermeasures Lesson 13: Using Common Mode Choke Coils for Signal Lines | Murata Manufacturing Articles

2024-11-14 02:45:04| Spiritual Career Counseling

Noise Suppression Filter Guide 07/22/2014 Noise Suppression Filter Guide Noise Suppression Products EMI Suppression Filters ESD Protection Devices Common mode choke coils/common mode noise filters This article -provides information on the use of common mode choke coils for signal lines. 1. Skew-improvement function of common mode choke coils The main reason common mode choke coils are used in signal lines is to eliminate common mode noise, but since common mode choke coils utilize the operating principle of a transformer they can be expected to provide a skew correction function in a differential transmission circuit. Ideally, both lines of a differential transmission circuit are designed to be balanced, but factors such as manufacturing inconsistency can cause them to be unbalanced. This can cause a gap between the signal arrival times of the two lines, resulting in skewing of the transmission signal (figure 1). In such cases, inserting a common mode choke coil can reduce the amount o...


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