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4 条记录 (耗时 0.008 秒)

    LOCAL BROADCASTING SYSTEM
    2.
    发明公开
    LOCAL BROADCASTING SYSTEM 有权
    LOKALES RUNDFUNKSYSTEM

    公开(公告)号：EP2190114A1

    公开(公告)日：2010-05-26

    申请号：EP08830079.3

    申请日：2008-09-03

    申请人： Toa Corporation

    发明人： KAWAI, Yuma ,  KAWAGUCHI, Koji

    IPC分类号： H03F3/20 ,  H04R3/00 ,  H04R3/12

    CPC分类号： H03F3/085 ,  H03F1/52 ,  H03F3/181 ,  H03F3/20 ,  H03F2200/03 ,  H04R3/12

    摘要： [Object]
    To downsize a power amplifier, while keeping isolation between a transmission line and ground potential.
    [Means to Realize Object]
    Two terminals (2a, 2b) of an audio signal source (2) are connected to an input of an isolation input circuit (6). An audio signal developed, being isolated from the input-side, between two output-side terminals (6a, 6b) of the isolation input circuit (6) are inputted to a power amplifying stage (12). The power amplifying stage (12) amplifies the audio signal and outputs it at a high voltage from two output terminals (12c, 12d) to a plurality of loudspeakers (22) without using an insulation transformer. Operating power is supplies to the power amplifying stage (12) from two power supply terminals (20c, 20d) of a DC power supply (14). One (6d) of the terminals of the insulation input circuit (6), one (12d) of the output terminals of the power amplifying stage (12) and one (20d) of the power supply terminals of the DC power supply (14) are connected together to provide a common potential point different from the ground potential.

    摘要翻译： [对象]为了减小功率放大器的尺寸，同时保持传输线和接地电位之间的隔离。 [实现对象的手段]音频信号源（2）的两个端子（2a，2b）连接到隔离输入电路（6）的输入端。 在隔离输入电路（6）的两个输出侧端子（6a，6b）之间产生与输入侧隔离的音频信号被输入到功率放大级（12）。 功率放大级（12）放大音频信号，并且在不使用绝缘变压器的情况下以高电压从两个输出端子（12c，12d）向多个扬声器（22）输出。 工作电源是从直流电源（14）的两个电源端子（20c，20d）向功率放大级（12）供电。 绝缘输入电路（6）的端子中的一个（6d），功率放大级（12）的一个输出端（12d）和直流电源（14）的一个（20d）电源端子 连接在一起以提供与地电势不同的公共电位点。

    AUDIO POWER AMPLIFIER
    3.
    发明公开
    AUDIO POWER AMPLIFIER 有权
    AUDIOLEISTUNGSVERSTÄRKER

    公开(公告)号：EP2202880A1

    公开(公告)日：2010-06-30

    申请号：EP08841759.7

    申请日：2008-10-08

    申请人： Toa Corporation

    发明人： KAWAGUCHI, Koji

    IPC分类号： H03F3/68 ,  H03F3/20 ,  H04R3/12

    CPC分类号： H03F3/68 ,  H03F1/0277 ,  H03F1/52 ,  H03F3/187 ,  H03F3/211 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/414 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/21109 ,  H03F2203/21145 ,  H04R3/007 ,  H04R3/12

    摘要： [Object] To provide a high-impedance type power amplifier smaller in size and weight than conventional ones and flexibly adaptable in various use conditions.
    [Solution] When a multi-channel mode is selected, an input-side relay 16 is switched to connect an input side of an amplifying circuit 12a for Channel 2 CH2 to an input terminal 14a for Channel 2 CH2, and, at the same time, an output-side relay 42 is turned off, whereby a multi-channel amplifier having Channel 1 CH1 and Channel 2 CH is formed. On the other hand, when a large-output mode is selected, the input-side relay 16 is switched to connect the input side of the amplifying circuit 12a for Channel 2 CH2 to an input terminal 14 for Channel 1 CH1, and, at the same time, the output-side relay 42 is turned on, whereby a large output amplifier having only one channel, namely, Combined channel CH0, but having a rated output of 60 W.

    摘要翻译： [目的]提供一种比常规尺寸更小的高阻抗型功率放大器，并且可在各种使用条件下灵活适应。 [解决方案]当选择多通道模式时，切换输入侧继电器16以将通道2 CH2的放大电路12a的输入侧连接到通道2 CH2的输入端子14a，并且同时 输出侧继电器42截止，由此形成具有通道1 CH1和通道2CH的多通道放大器。 另一方面，当选择大输出模式时，切换输入侧继电器16以将用于通道2 CH2的放大电路12a的输入侧连接到通道1 CH1的输入端子14，并且在 同时，输出侧继电器42导通，由此仅具有一个通道的大输出放大器，即组合通道CH0，但额定输出为60W。