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    Method and circuit for testing an audio high-frequency loudspeaker being part of a loudspeaker system
    1.
    发明授权
    Method and circuit for testing an audio high-frequency loudspeaker being part of a loudspeaker system 有权
    的方法和电路，用于测试的扬声器系统的一个高频扬声器

    公开(公告)号：EP2048896B1

    公开(公告)日：2011-12-21

    申请号：EP07425643.9

    申请日：2007-10-12

    Applicant: STMicroelectronics Srl

    Inventor： Botti, Edoardo ,  Gognano, Giovanni ,  Adduci, Pietro Mario

    IPC: H04R29/00 ,  H04R5/04

    CPC classification number: H04R29/001 ,  H04R1/26 ,  H04R29/003 ,  H04R2420/05

    Abstract: The present invention relates to a method and a circuit for testing a tweeter (4B) in a bridge-type class D switching amplifier, said tweeter (4B) being part of a loudspeaker system (1A), wherein the method includes the steps of: applying a high-frequency voltage signal (VinAC) to one terminal (4D) of said tweeter (4B), said high-frequency voltage signal (VinAC) being generated by first electronic means (8); applying a constant voltage signal (VinDC) to the other terminal (4E) of said tweeter (4B), said constant voltage signal (VinDC) being generated by second electronic means (9); measuring a current I load that flows through said tweeter (4B) into said second electronic means (9); determining a connect/disconnect state of said tweeter (4B) from the value of said current (I load ).

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