| 摘要 |
PURPOSE: A speaker is provided to simplify a driving circuit of the speaker by comprising a passive filter of a digital AMP circuit for driving the speaker in a frame of the speaker and a terminal plate. CONSTITUTION: A speaker includes a frame(21), a yoke(22), a magnet(23), a pole piece(24), a voice coil, a vibration plate(26), a terminal plate(27), and a passive filter. The yoke is combined with the frame. The magnet is inserted into the yoke. The pole piece is mounted on an upper part of the magnet. The voice coil moves up and down as forming a magnetic field with the magnet. The vibration plate generates a sound wave by vibrating the air with up and down by being adhered to the voice coil. The terminal plate inputs an electric signal to the voice coil. The passive filter is formed in the frame and terminal plate. |
