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    Wireless telephone handset
    4.
    发明授权
    Wireless telephone handset 失效
    无线电话听筒

    公开(公告)号：US5828965A

    公开(公告)日：1998-10-27

    申请号：US720277

    申请日：1996-09-26

    申请人： Michael Brown ,  Laura A. Mahan ,  Andre J. Van Schyndel ,  Hugh M. Collins ,  Frederic Simard ,  Christopher M. Forrester

    发明人： Michael Brown ,  Laura A. Mahan ,  Andre J. Van Schyndel ,  Hugh M. Collins ,  Frederic Simard ,  Christopher M. Forrester

    IPC分类号： H04M1/02 ,  H04M1/60 ,  H04Q7/32

    CPC分类号： H04M1/605 ,  H04M1/0245 ,  H04M1/0214

    摘要： Portable wireless telephone handset with a flap movable upon a housing. In a first position the flap is close to a speaker to enable the flap to be disposed near to a user's ear for the user to receive personal low volume sound from the speaker. In a second position, the flap is further from the speaker to detract from use of the speaker near to the user's ear. In the second position of the flap, the speaker operates in loudspeaker mode. A switch is provided to change the speaker between loudspeaker and low volume sound mode, the switch operation being dependent upon flap position.

    摘要翻译： 便携式无线电话听筒，带有可在外壳上移动的挡板。 在第一位置，翼片靠近扬声器，以使翼片能够靠近使用者的耳朵放置，使得用户能够从扬声器接收个人低音量的声音。 在第二位置，舌片进一步离开扬声器以减少靠近使用者耳朵的扬声器的使用。 在襟翼的第二位置，扬声器以扬声器模式工作。 提供开关以改变扬声器和低音量声音模式之间的扬声器，开关操作取决于翻盖位置。

    Automatic sidetone selector
    5.
    发明授权
    Automatic sidetone selector 失效
    自动侧音选择器

    公开(公告)号：US5398282A

    公开(公告)日：1995-03-14

    申请号：US40850

    申请日：1993-03-31

    申请人： Christopher M. Forrester ,  David A. Pepper ,  Guy J. Fortier ,  Norbert J. Diesing ,  W. J. Leonard McCready

    发明人： Christopher M. Forrester ,  David A. Pepper ,  Guy J. Fortier ,  Norbert J. Diesing ,  W. J. Leonard McCready

    IPC分类号： H04M1/58 ,  H04M1/00

    CPC分类号： H04M1/585

    摘要： Sidetone in a four-wire telephone station set that is coupled to a two-wire telephone line through a four-to-two wire hybrid circuit is automatically and cancel the phase "to a predetermined value", set by incrementally adjusting a balancing impedance connected to the circuit until an optimum impedance match between the telephone set and line is achieved. Under software control, during idle intervals between dialed digits when a call is initiated, a microcontroller mutes the telephone transmitter and receiver on the telephone side of the circuit and substitutes for these components a tone signal generator to produce a sidetone signal that is applied to a full-wave rectifier and therefrom to a peak voltage detector to generate a sidetone envelope. Individual ones of several impedance balancing networks are then sequentially connected to the telephone side of the circuit and the sidetone envelope for each balancing impedance is digitally encoded and stored. A mutual comparison of the stored data indicates a minimum sidetone value which corresponds to an optimum impedance match that is retained unless a subsequent telephone call results in a change of balancing impedance.

    摘要翻译： 通过四至二线混合电路耦合到两线电话线的四线电话站中的侧音自动地消除相位“达到预定值”，通过逐渐调整连接的平衡阻抗来设置 直到达到电话机和线路之间的最佳阻抗匹配。 在软件控制下，在呼叫开始时，在拨号数字之间的空闲间隔期间，微控制器使电话机的电话侧的电话发射机和接收机静音，并将这些组件替代为音调信号发生器，以产生应用于 全波整流器和从其到达峰值电压检测器以产生侧面信封。 然后，几个阻抗平衡网络中的单个电路顺序地连接到电路的电话侧，并且对于每个平衡阻抗的侧音包络进行数字编码和存储。 所存储的数据的相互比较表明最小侧音值对应于保持的最佳阻抗匹配，除非后续电话呼叫导致平衡阻抗的改变。