公开(公告)号：US6154639A

公开(公告)日：2000-11-28

申请号：US199483

申请日：1998-11-25

申请人： Takuya Kanazumi ,  Osamu Kurokawa ,  Akira Ishikura ,  Yoshihiro Nomura ,  Masakuni Hyodo ,  Ken Nakamura

发明人： Takuya Kanazumi ,  Osamu Kurokawa ,  Akira Ishikura ,  Yoshihiro Nomura ,  Masakuni Hyodo ,  Ken Nakamura

IPC分类号： H04B1/40 ,  H04B1/46 ,  H04B7/26 ,  H04M1/60 ,  H04M9/08 ,  H04W88/02

CPC分类号： H04B1/46 ,  H04M9/08

摘要： The present invention provides a cheap handsfree unit which can prevent the howling phenomenon and reduce the input sound from the loud-speaker into the microphone in both the analog and digital modes. A reception side comprises a signal level adjusting circuit constituted by a switch circuit and attenuators, and a transmission side comprises a signal level adjusting circuit constituted by a switch circuit and attenuators, to introduce the attenuation of 15 dB or 30 dB in response to the analog or digital mode. A voice switch is constituted so that the analog reception signal and the analog transmission signal are rectified respectively by rectifiers, the levels of both signals are compared by a comparator, and either switch or switch having a higher input signal level becomes conductive as a result of the comparison. The attenuation is introduced on the basis of the communication mode, only to either the analog reception signal or analog transmission signal having a smaller signal intensity.

摘要翻译： 本发明提供了一种廉价的免提单元，其可以在模拟和数字模式中防止啸叫现象并将扬声器的输入声音降低到麦克风中。 接收侧包括由开关电路和衰减器构成的信号电平调整电路，发送侧包括由开关电路和衰减器构成的信号电平调整电路，以响应于模拟信号引入15dB​​或30dB的衰减 或数字模式。 构成语音开关，使得模拟接收信号和模拟发送信号分别由整流器整流，两个信号的电平由比较器进行比较，并且具有较高输入信号电平的开关或开关由于 比较。 基于通信模式引入衰减，仅对具有较小信号强度的模拟接收信号或模拟发送信号。

公开(公告)号：US5995813A

公开(公告)日：1999-11-30

申请号：US946973

申请日：1997-10-08

申请人： Akira Ishikura ,  Buntaro Sawa ,  Masatoshi Ikeda

发明人： Akira Ishikura ,  Buntaro Sawa ,  Masatoshi Ikeda

IPC分类号： H04B1/38 ,  H04B7/005 ,  H04W52/00 ,  H04W52/02 ,  H04W52/52 ,  H04B1/02

CPC分类号： H04W52/52 ,  H04B1/3877

摘要： In a radio telephone equipment which includes a portable radiotelephone (100) and a booster (400), an output from the portable radiotelephone (100) whose output level is set according to a level control signal transmitted from a base station is amplified with a preset amplification factor by an automatic gain control circuit (22) provided in the booster (400). As a result, since the amplification factor of the amplifier in the booster and the portable radiotelephone are independently controlled, the booster can be connected to even a portable radiotelephone which is designed without considering that it will be connected to the booster.

摘要翻译： 在包括便携式无线电话机（100）和升压器（400）的无线电话设备中，根据从基站发送的电平控制信号设置其输出电平的便携式无线电话机（100）的输出被放大预设 通过设置在增压器（400）中的自动增益控制电路（22）进行放大。 结果，由于升压器和便携式无线电话机中的放大器的放大系数被独立地控制，所以升压器可以连接到甚至便携式无线电话机，该便携式无线电话机被设计而不考虑它将被连接到增强器。

公开(公告)号：US5191277A

公开(公告)日：1993-03-02

申请号：US584828

申请日：1990-09-19

申请人： Akira Ishikura ,  Takaaki Ishii

发明人： Akira Ishikura ,  Takaaki Ishii

IPC分类号： H02J7/34 ,  H02J7/00

CPC分类号： H02J7/0004 ,  H02J7/0036 ,  H02J7/0068 ,  Y10S320/12

摘要： An electronic apparatus comprising a charger and an electronic device connected removably to the charger. The electronic device comprises a rechargeable battery unit charged by the charger when the charger is connected to the electronic device, an electronic unit having a plurality of operational modes in each of which a different operating current is required, a charger connection detector for detecting the connection of the charger to the electronic device, and a first control unit for calculating an appropriate current to be supplied from the charger, on the basis of an appropriate operating current value corresponding to the operational mode of the electronic unit and a specified charging current value for the battery unit, and informing the charger of the appropriate supplying current value when the charger connection detector detects that the charger is connected to the electronic device. The charger comprises a current supplying circuit for supplying the electric current to the electronic device, and a second control unit for controlling the current to be supplied by the current supplying circuit such that the controlled current coincides with the appropriate supplying current when the first control unit informs the charger of the appropriate supplying current value.

摘要翻译： 一种电子设备，包括可拆卸地连接到充电器的充电器和电子设备。 电子设备包括当充电器连接到电子设备时由充电器充电的可再充电电池单元，具有多个操作模式的电子单元，每个操作模式中的每一个都需要不同的工作电流;充电器连接检测器，用于检测连接 以及第一控制单元，用于基于与电子单元的操作模式相对应的适当的工作电流值和用于计算从充电器提供的适当电流的规定的充电电流值来计算适当的电流 电池单元，并且当充电器连接检测器检测到充电器连接到电子设备时，通知充电器适当的供电电流值。 充电器包括用于向电子设备供电的电流供应电路，以及第二控制单元，用于控制由电流供应电路提供的电流，使得受控电流与适当的供电电流一致时，当第一控制单元 通知充电器适当的供电电流值。