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logo Examples of Noise Suppression in AC Power Supplies


Differential (Normal) Mode Noise and Common Mode Noise

Noise is classified into two types, differential mode noise and common mode noise.

Differential mode noise is conducted on the two power supply lines in opposite directions to each other, as shown in Fig.1(a).

Common mode noise is conducted on all lines in the same direction, as shown in Fig.1(b).
Noise Emission Status
for Switching Power Supplies
Noise Suppression Model
for Ordinary Switching Power Supplies
   
Noise Tendencies in Switching Power Supplies
Examples of Conventional Suppression
against Strong Differential Mode Noise
Effective Suppression Methods against
Differential Mode Noise using Hybrid Choke Coils
Examples of Confirming the Effectiveness
of Hybrid Choke Coils
 
< References >
Differential Mode Noise and Common Mode Noise
Functions of Respective Noise Filters
Reasons Why Common Mode Choke Coils
Contain Differential Mode Inductance

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