Power supply unit

Abstract

Abstract PURPOSE:To eliminate the influence of a voice output circuit to a video/chroma circuit by separating an earth foil for a power source supplied to the voice output circuit from the foil for other circuit and inserting an electrolytic capacitor between them. CONSTITUTION:At a switching power source printed circuit board 1 that constitutes a switching power source circuit for a television receiver, an electrolytic capacitor 4 for bypassing is connected between an earth foil 5b in a power source circuit for a voice output circuit 2a and an earth foil 5a in the power source circuit for other video/chroma circuit 2 (other circuit print circuit board), etc. The share of power source fluctuation generated at the voice output circuit 2a is absorbed passing through an arrow indicated path and influence to the video/chroma circuit 2b is reduced because it is absorbed by the capacitor 4 for the bypassing and sonic stripes are also reduced without being recognized by visual observation.

Inventors

• 👤 Chisato Nakao
• 👤 中尾　千里

Bibliographic Details