| 摘要 |
PURPOSE: To improve the attenuation, by a method wherein a tap-off point is provided at a specific position between the terminals of a choke coil. CONSTITUTION: A choke coil winding of a smoothing filter of a rectifier is divided into two parts AK and KB, and a load Z is connected between a tap-off point K and the ground. The position of the tap-off point K is so selected as to conform to a relation: nk /N=1/ωg <2> LC (wherein N denotes the total number of turns of the choke coil, nk denotes the number of turns of the choking part KB, andωg denotes the frequency of the fundamental harmonic wave of a pulsating voltage).
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