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1. 发明授权

US08411848B2 Telephone interface circuit for providing over-current and over-voltage protection 失效
标题翻译：电话接口电路，用于提供过电流和过压保护
公开(公告)号：US08411848B2
公开(公告)日：2013-04-02
申请号：US12268895
申请日：2008-11-11
申请人： Yoshinobu Fujiwara
发明人： Yoshinobu Fujiwara
IPC分类号： H04M1/00 , H04M9/00
CPC分类号： H04M1/745
摘要： In a telephone interface circuit, a first NPN transistor switch-controls a connection between a speech circuit and a pair of subscriber lines. A second PNP transistor controls an on/off state of the first transistor. A positive feedback circuit connects a collector terminal of the first transistor to a base terminal of the second transistor. An internal power source supplies current for driving the second transistor. The first transistor operates in a saturated region when a voltage that is in a range of standard voltages delivered over a pair of subscriber lines for normal operating conditions of a subscriber line device that is not being subjected to an over-voltage or an over-current event is applied in between the pair of the subscriber lines. The first transistor operates in an unsaturated region when an overvoltage exceeding said range of standard voltages is applied in between the pair of the subscriber lines.
摘要翻译：在电话接口电路中，第一NPN晶体管开关控制语音电路和一对用户线之间的连接。第二PNP晶体管控制第一晶体管的导通/截止状态。正反馈电路将第一晶体管的集电极连接到第二晶体管的基极。内部电源为驱动第二晶体管提供电流。第一晶体管工作在饱和区域，当不经受过电压或过电流的用户线路装置的正常工作条件下，在一对用户线路上传送的标准电压范围内的电压事件被应用在一对用户线路之间。当在一对用户线路之间施加超过所述标准电压范围的过电压时，第一晶体管工作在不饱和区域。

2. 发明授权

US07995744B2 Telephone interface circuit 失效
标题翻译：电话接口电路
公开(公告)号：US07995744B2
公开(公告)日：2011-08-09
申请号：US11669470
申请日：2007-01-31
申请人： Yoshinobu Fujiwara
发明人： Yoshinobu Fujiwara
IPC分类号： H04M1/00
CPC分类号： H04M1/738
摘要： A hook switch turns on a transistor by connecting the positive electrode terminal of a capacitor to a base terminal of a transistor in an off-hook state, causing a speech circuit and telephone lines to be connected. The hook switch turns off the transistor by disconnecting the positive electrode terminal of the capacitor from the base terminal of the transistor in an on-hook state, causing the speech circuit and the telephone lines to be disconnected. A holding circuit holds the voltage at the positive electrode terminal of the capacitor at a substantially fixed value by charging the capacitor with electric power supplied from the telephone lines in an off-hook state.
摘要翻译：挂钩开关通过将电容器的正极端子与脱扣状态的晶体管的基极端子连接来接通晶体管，从而连接语音电路和电话线。挂钩开关通过在挂机状态下将电容器的正极端子与晶体管的基极端子断开而使晶体管断开，导致语音电路和电话线路断开。保持电路通过从处于摘机状态的电话线路供电的电力对电容器进行充电来将电容器的正极端子处的电压保持在大致固定值。

3. 发明申请

US20080285741A1 TELEPHONE INTERFACE CIRCUIT 审中-公开
标题翻译：电话接口电路
公开(公告)号：US20080285741A1
公开(公告)日：2008-11-20
申请号：US11749727
申请日：2007-05-16
申请人： Yoshinobu Fujiwara
发明人： Yoshinobu Fujiwara
IPC分类号： H04M1/738
CPC分类号： H04M1/738
摘要： A telephone interface circuit has a first transistor for opening and closing a connection between a speech circuit and a pair of subscriber lines, a second transistor for controlling ON/OFF states of the first transistor, and a positive feedback circuit for positively feeding back, to a base terminal of the second transistor, a part of collector current flowing through the first transistor. A circuit constant is set such that when normal use voltage is applied to the pair of subscriber lines, the second transistor operates in a saturation region, and when voltage exceeding the normal use voltage is applied to the pair of subscriber lines, the second transistor operates in a non-saturation region.
摘要翻译：电话接口电路具有用于打开和关闭语音电路和一对用户线路之间的连接的第一晶体管，用于控制第一晶体管的导通/截止状态的第二晶体管和用于正反馈的正反馈电路，第二晶体管的基极端子，流经第一晶体管的集电极电流的一部分。设定电路常数，使得当正常使用电压施加到一对用户线路时，第二晶体管在饱和区域中工作，并且当超过正常使用电压的电压被施加到该对用户线路时，第二晶体管工作在非饱和区域。

4. 发明授权

US07221661B2 Radio terminal, radio synchronization system having no base station, and recording medium 失效
标题翻译：无线终端，无基站的无线同步系统和记录介质
公开(公告)号：US07221661B2
公开(公告)日：2007-05-22
申请号：US10209908
申请日：2002-08-02
申请人： Masaki Matsui , Eiji Shinsho , Minoru Ogino , Shigeo Sato
发明人： Masaki Matsui , Eiji Shinsho , Minoru Ogino , Shigeo Sato
IPC分类号： H04B7/212
CPC分类号： H04B1/40 , H04W74/04
摘要： According to the present invention, all terminals can establish synchronization in a radio communications system formed only of a plurality of mobile terminals. This radio terminal communicates by the time division connection method, and comprises a control portion for synchronizing its transmission/reception timing to that of a group including a plurality of radio terminals. The control portion determines the overall cycle including basic cycles in a number corresponding to the number of radio terminals within said group, conducts control to transmit a signal in a basic cycle that is included in said overall cycle and that is set by a unique terminal number allotted in advance to each of said radio terminals, conducts control to receive signals from another radio terminal in another basic cycle, adjusts the transmission/reception timing based on the data received from said other radio terminal in said other basic cycle, and saves the reception timing until a process to adjust the transmission/reception timing is conducted.
摘要翻译：根据本发明，所有终端都可以在仅由多个移动终端形成的无线电通信系统中建立同步。该无线终端通过时分连接方式通信，并且包括用于将其发送/接收定时与包括多个无线终端的组的发送/接收定时同步的控制部分。控制部分确定整个周期，包括对应于所述组内的无线电终端数量的数量的基本周期，进行控制以发送包含在所述整个周期中的基本周期中的信号，并且由唯一终端号码预先分配给每个所述无线电终端，进行控制以在另一个基本周期中从另一个无线电终端接收信号，基于在所述另一个基本周期中从所述另一个无线电终端接收的数据来调整发送/接收定时，并且保存接收进行到调整发送/接收定时的处理的定时。

5. 发明授权

US07127229B2 Emergency report cellular phone, cellular connection switching method and GPS positioning method 失效
公开(公告)号：US07127229B2
公开(公告)日：2006-10-24
申请号：US10233666
申请日：2002-09-04
申请人： Yoshihiko Baba , Teruhide Kunimitsu , Kenji Sekine , Mikio Iwakuni , Katsuhiro Miyamoto , Toshiaki Yuasa , Toshihiro Takahashi , Norio Abe , Shuji Konishi , Tadashi Kogure , Jun Yoshida , Katsuya Kaneda , Isao Ohki , Masaru Akiyama , Masato Suzuki
发明人： Yoshihiko Baba , Teruhide Kunimitsu , Kenji Sekine , Mikio Iwakuni , Katsuhiro Miyamoto , Toshiaki Yuasa , Toshihiro Takahashi , Norio Abe , Shuji Konishi , Tadashi Kogure , Jun Yoshida , Katsuya Kaneda , Isao Ohki , Masaru Akiyama , Masato Suzuki
IPC分类号： H04M11/04
CPC分类号： H04M1/72541 , G01S2205/006 , H04M1/72538 , H04W4/90 , H04W64/00 , H04W76/50 , H04W84/042 , H04W88/02
摘要： The object of the present invention is to provide a cellular phone to be used for emergency reports that performs GPS positioning by means of remote control from an emergency report center, and transmits positional information to the emergency report center. The emergency report cellular phone according to the present invention is constituted such that when an emergency report switch thereof is depressed, a call request is made to the emergency report center. The emergency report center transmits a response signal with the result that a call link is formed between the emergency report cellular phone and the emergency report center. Following completion of the telephone call, the emergency report center transmits a position recalculation command message, by means of a DTMF signal. The emergency report cellular phone, which has received this command message, performs GPS positioning and then converts latitudinal and longitudinal information to a DTMF signal before transmitting same to the emergency report center. As a result, even in a case where, in a time of emergency, a reporting party is unable to perform GPS positioning manually as a result of a poor physical condition, for example, since GPS positioning is possible by means of remote control, it is possible to rescue the reporting party in a rapid and reliable manner.

6. 发明授权

US07110719B2 Indoor mobile communication device 失效
标题翻译：室内移动通信设备
公开(公告)号：US07110719B2
公开(公告)日：2006-09-19
申请号：US10256252
申请日：2002-09-27
申请人： Akio Horibe , Hitoshi Hachiga
发明人： Akio Horibe , Hitoshi Hachiga
IPC分类号： H04B7/00 , H04B1/06 , H04H1/00
CPC分类号： H01Q1/007 , H01Q9/0421 , H04B1/38 , H04B7/0602 , H04B7/0814 , H04B7/10
摘要： It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable communication with a small fading effect. In order to attain this object, the present invention provides an indoor mobile communication device which is equipped with an antenna with fixed direction characteristics such as electromagnetic wave emission direction and half-power angle and is capable of mobile communications, while freely changing the position and direction inside an indoor space, this device comprising an antenna for transmission and reception of linearly polarized waves, the antenna having a half-power angle within 180 degrees and a directivity such that the emission level within a range of from 90 degrees to 270 degrees, as measured from the maximum emission direction, is less than the maximum emission level by 10 dB or more and a wireless unit for conducting modulation and demodulation of the signals superimposed on the electromagnetic waves transmitted and received via the antenna.
摘要翻译：本发明的目的是提供一种具有简单结构的室内移动通信设备，提供足够的通信范围，并且还提供具有小的衰落效果的稳定通信。为了达到上述目的，本发明提供一种室内移动通信装置，其具有电磁波发射方向和半功率角等固定方向特性的天线，能够进行移动通信，同时自由地改变位置，该装置包括用于线偏振波的发射和接收的天线，该天线具有180度以内的半功率角度和使得发射水平在90度至270度的范围内的方向性，从最大发射方向测得的，小于10dB以上的最大发射电平，以及用于进行叠加在经由天线发送和接收的电磁波上的信号的调制和解调的无线单元。

7. 发明授权

US06889184B2 Device for improving voice signal in quality 失效
标题翻译：改善语音信号质量的设备
公开(公告)号：US06889184B2
公开(公告)日：2005-05-03
申请号：US09739225
申请日：2000-12-19
申请人： Masato Tanaka , Meizhong Wang , Kazuhiko Seki
发明人： Masato Tanaka , Meizhong Wang , Kazuhiko Seki
IPC分类号： G10L19/00 , G11B20/10 , G11B20/18 , H03M3/00 , H04B14/04
CPC分类号： G10L19/005 , G11B20/10527 , G11B20/1806
摘要： Provided is a code correction circuit for presuming an error pattern of the received code when a received ADPCM code contains a click noise and correcting such error. A device for improving voice signal comprises a click noise detector (13) which judges that a received ADPCM code contains a click noise when a short interval average value of the absolute value of the received ADPCM code exceeds a predetermined value, and a code correction circuit (11) which presumes an error position of the bit of the received ADPCM code and corrects such error so as to minimize the variation in the short interval average value of the absolute value of the received ADPCM code when a transmission error is generated in the receiving ADPCM code judged to be containing a click noise.
摘要翻译：提供了一种代码校正电路，用于当接收到的ADPCM代码包含点击噪声并且校正这种错误时，假定接收到的代码的错误模式。一种用于改善语音信号的装置包括一个咔嗒声噪声检测器（13），当所接收的ADPCM码的绝对值的短间隔平均值超过预定值时，该点击噪声检测器（13）判定所接收的ADPCM码包含一个咔嗒声噪声，以及一个码校正电路（11），其假设接收到的ADPCM码的位的错误位置并校正这种误差，以便在接收到的发送错误时产生接收到的ADPCM码的绝对值的短间隔平均值的变化最小化 ADPCM代码被判断为包含点击噪声。

8. 发明申请

US20040264689A1 Telephone equipped with speaker 审中-公开
标题翻译：电话配有扬声器
公开(公告)号：US20040264689A1
公开(公告)日：2004-12-30
申请号：US10633695
申请日：2003-08-05
申请人： Uniden Corporation
发明人： Yoshimi Takahashi
IPC分类号： H04M001/00 , H04M009/00
CPC分类号： H04M1/6033 , H04M1/72502
摘要： The object of the present invention is to improve convenience of a telephone equipped with a speaker. In order to attain this object, the telephone equipped with a speaker in accordance with the present invention comprises a telephone body and a speakerphone functional unit comprising a microphone and a speaker and capable of being detachably mounted on the telephone body. The speakerphone functional unit comprises a wireless unit, and exchange of voice signals and control signals with the telephone body is conducted via the wireless circuit. As a result, the speakerphone functional unit can be freely used anywhere, without selecting a special location therefor.
摘要翻译：本发明的目的是提高配备扬声器的电话的便利性。为了实现该目的，根据本发明的配备有扬声器的电话包括电话机和扬声器功能单元，其包括麦克风和扬声器，并且能够可拆卸地安装在电话机上。扬声器功能单元包括无线单元，并且经由无线电路传送与电话机的语音信号和控制信号的交换。结果，扬声器功能单元可以在任何地方自由地使用，而不需要选择特殊的位置。

9. 发明申请

US20040228060A1 Overvoltage and overcurrent protection circuit and telephone interface protection circuit 审中-公开
标题翻译：过压和过流保护电路和电话接口保护电路
公开(公告)号：US20040228060A1
公开(公告)日：2004-11-18
申请号：US10457784
申请日：2003-06-10
申请人： Uniden Corporation
发明人： Yoshinobu Fujiwara , Kyokusei Matsuda , Hiroshi Adachi
IPC分类号： H02H005/04
CPC分类号： H02H9/042 , H04M3/18
摘要： An object of the present invention is to provide a telephone interface protection circuit that has excellent standards of safety. In order to achieve this, the telephone interface protection circuit according to this invention comprises a voltage limiting element to limit surge voltages to no more than the withstand voltage of the circuit to be protected; and a positive temperature coefficient thermostatic resistor to limit the flow of overcurrents to the circuit to be protected. The voltage limiting element and positive temperature coefficient thermostatic resistor are thermally coupled together. In the event that an overcurrent is continuously supplied from the subscriber telephone lines, even in the zone below the sensitive current, when the terminal voltage of the voltage limiting element exceeds the threshold voltage, the positive temperature coefficient thermostatic resistor receives the heat emitted from the voltage limiting element and shifts the Curie point, ensuring that the circuit to be protected is blocked from the subscriber telephone lines.
摘要翻译：本发明的目的是提供一种具有优良的安全标准的电话接口保护电路。为了实现这一点，根据本发明的电话接口保护电路包括限制电压限制元件，以将浪涌电压限制在不超过待保护电路的耐受电压; 和正温度系数恒温电阻，以限制要保护的电路的过电流。电压限制元件和正温度系数恒温电阻热耦合在一起。在从用户电话线连续供给过电流的情况下，即使在低于敏感电流的区域中，当限压元件的端子电压超过阈值电压时，正温度系数恒温电阻器接收从电压限制元件并移动居里点，确保要保护的电路从用户电话线路中被阻止。

10. 发明授权

US6160838A Spread spectrum transmitter, spread spectrum receiver and spread spectrum communication method and automatic gain control circuit for spread spectrum receiver 失效
标题翻译：扩频发射机，扩频接收机和扩频通信方式以及扩频接收机的自动增益控制电路
公开(公告)号：US6160838A
公开(公告)日：2000-12-12
申请号：US987024
申请日：1997-12-09
申请人： Yoshinori Shinohara , Kazuhiko Seki
发明人： Yoshinori Shinohara , Kazuhiko Seki
IPC分类号： H04B1/707 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/707 , H04B1/709
摘要： A spread spectrum transmitter and receiver are provided wherein data can be accurately decoded by removing the effect of mutual interference of the quadrature component and in-phase component even when there is carrier frequency error. In a method of spread spectrum communication using a QPSK modulation system, there are provided: a demodulating circuit that receives and demodulates a signal transmitted with a prescribed time difference Td applied between the IQ components; correlators that find the mutual correlation of the IQ components and spreading code; a sampling circuit that samples their output signals; a phase calculator that calculates the phase from the ratio of the IQ components of these output signals; a differential decoding circuit that performs differential decoding on this output signal; an automatic frequency control circuit that corrects the frequency error of this output signal; a decoding circuit; and a clock recovery circuit.
摘要翻译：提供了一种扩频发射机和接收机，其中即使存在载波频率误差，也可以通过消除正交分量和同相分量的相互干扰的影响来准确地解码数据。在使用QPSK调制方式的扩频通信方法中，提供：解调电路，接收并解调以IQ分量之间施加的规定时间差Td发送的信号; 发现IQ分量和扩展码的相互关系的相关器; 采样电路，对其输出信号进行采样; 相位计算器，根据这些输出信号的IQ分量的比率来计算相位; 对该输出信号执行差分解码的差分解码电路; 自动频率控制电路，用于校正该输出信号的频率误差; 解码电路; 和时钟恢复电路。

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