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公开(公告)号：US5844868A
公开(公告)日：1998-12-01
申请号：US824794
申请日：1997-03-26
CPC分类号： H04B1/403
摘要： A digital-analog shared circuit in dual mode radio equipment, which shares a local oscillator in a digital mode and analog mode. A first frequency synthesizer generates a first and a second local oscillation frequency in a digital and an analog receiving mode, respectively, in response to a control signal from a switching control. In the digital receiving mode, a quadrature demodulater including a first and a second demodulator in a demodulator section is enabled, and carries out quadrature detection of a received signal fed from an RF stage, thereby supplying the detected signal to a baseband signal processor stage. In the analog receiving mode, a buffer to which the second local oscillation frequency is supplied is enabled to deliver the second local oscillation frequency to the analog IF stage. A second frequency synthesizer generates a third local oscillation frequency in a digital transmitting mode and a fourth local oscillation frequency in an analog transmitting mode. In the digital transmitting mode, a quadrature modulator including a first and a second modulator is enabled to carry out quadrature modulation using the third local oscillation frequency. In the analog transmitting mode, the fourth local oscillation frequency undergoes frequency modulation by an analog modulating signal, and the modulated signal is in turn supplied to the RF stage through the second modulator.
摘要翻译： 双模无线电设备中的数模模拟共享电路，以数字模式和模拟模式共享本地振荡器。 第一频率合成器响应于来自开关控制的控制信号，分别在数字和模拟接收模式中产生第一和第二本地振荡频率。 在数字接收模式中，在解调器部分中包括第一解调器和第二解调器的正交解调器被使能，并且对从RF级馈送的接收信号进行正交检测，从而将检测信号提供给基带信号处理器级。 在模拟接收模式中，提供第二本地振荡频率的缓冲器能够将第二本地振荡频率传送到模拟IF级。 第二频率合成器在模拟发送模式中以数字发送模式和第四本地振荡频率产生第三本地振荡频率。 在数字发送模式中，包括第一和第二调制器的正交调制器能够使用第三本地振荡频率进行正交调制。 在模拟发送模式中，第四本地振荡频率通过模拟调制信号进行频率调制，并且调制信号又通过第二调制器提供给RF级。
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公开(公告)号：US5714908A
公开(公告)日：1998-02-03
申请号：US607245
申请日：1996-02-26
申请人： Chusei Takahashi
发明人： Chusei Takahashi
CPC分类号： H03G3/3042
摘要： An amplifier amplifies a signal derived from the output of a voltage-controlled oscillator. The frequency control voltage applied to the voltage-controlled oscillator is also applied, after suitable level conversion, to the amplifier as a gain control signal, to correct frequency-dependent power deviation of the amplifier.
摘要翻译： 放大器放大从压控振荡器的输出得到的信号。 施加到压控振荡器的频率控制电压在适当的电平转换之后也作为增益控制信号施加到放大器，以校正放大器的频率相关功率偏差。
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公开(公告)号：USD337764S
公开(公告)日：1993-07-27
申请号：US833719
申请日：1992-02-11
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公开(公告)号：US5095494A
公开(公告)日：1992-03-10
申请号：US355433
申请日：1989-05-22
申请人： Chusei Takahashi , Hiroshi Etoh
发明人： Chusei Takahashi , Hiroshi Etoh
CPC分类号： H04W28/18 , H03M13/00 , H04L1/0025 , H04M11/06
摘要： A data transmission apparatus is capable of data transmissions with and/or without error control. A remote data transmission apparatus with error control recognizes whether or not the carrier sent from the data transmission apparatus is intermittent. Additionally, the data transmission apparatus recognizes, based upon the existence of interruptions of a carrier signal sent from a remote data transmission apparatus, whether or not the remote data transmission apparatus has an error control function.
摘要翻译： 数据传输设备能够进行和/或不进行错误控制的数据传输。 具有错误控制的远程数据传输装置识别从数据传输装置发送的载波是否间歇。 此外，数据发送装置基于从远程数据发送装置发送的载波信号的中断的存在来识别远程数据发送装置是否具有错误控制功能。
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5.发明授权Idle current correcting circuit and low voltage drive type electronic appliance 失效空闲电流校正电路和低压驱动型电子设备
公开(公告)号：US5949159A
公开(公告)日：1999-09-07
申请号：US872061
申请日：1997-06-10
申请人： Chusei Takahashi
发明人： Chusei Takahashi
CPC分类号： H03F1/0211 , H03F1/0261 , Y10T307/747 , Y10T307/826 , Y10T307/858
摘要： An idle current supplying path is switched during correction operation and during normal operation to detect a magnitude of an idle current flowing through a power amplifying circuit when the correction operation is switched. A bias voltage of the power amplifying circuit is corrected based upon the idle current detecting result. The bias voltage is automatically corrected in such a manner that the magnitude of the idle current flowing through the power amplifying circuit is made coincident with a predetermined current value. As a consequence, the idle current flowing through the respective power amplifying circuit can be continuously maintained to the optimum values respective of to the element deviation.
摘要翻译： 在校正操作期间和正常操作期间切换空闲电流供应路径，以在校正操作切换时检测流过功率放大电路的空闲电流的大小。 基于空闲电流检测结果来校正功率放大电路的偏置电压。 偏置电压以使得流过功率放大电路的空闲电流的大小与预定电流值一致的方式自动校正。 结果，可以将流过各个功率放大电路的空闲电流连续地保持为与元件偏差相对应的最佳值。
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公开(公告)号：USD334015S
公开(公告)日：1993-03-16
申请号：US833720
申请日：1992-02-11
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7.发明授权Method and apparatus for notifying completion of data communication for mobile radio telephone 失效通知移动无线电话数据通信完成的方法和装置
公开(公告)号：US5046187A
公开(公告)日：1991-09-03
申请号：US305106
申请日：1989-01-31
申请人： Chusei Takahashi
发明人： Chusei Takahashi
CPC分类号： H04W88/02
摘要： A mobile radiotelephone for speech communication and data communication using signals of a voice frequency in a voice frequency band, having a tone signal generating circuit and connected to a data terminal equipment. Data communication completion is monitored, and the tone signal generating circuit is actuated to generate a tone signal by the speaker of a handset upon the completion of data communication in order to notify the operator of the completion of data communication. The speaker of the handset can be made to sound by controlling the existing tone signal generating circuit for tone dial. Thus, the mobile radiotelephone is able to notify the operator of the completion of data communication without requiring any additional tone signal generating circuit specially for such a purpose.
摘要翻译： 一种用于语音通信和数据通信的移动无线电话机，其使用语音频带中的语音频率的信号，具有音调信号发生电路并连接到数据终端设备。 监视数据通信完成，并且在数据通信完成时，音频信号发生电路被启动以由手机的扬声器产生音调信号，以通知操作者数据通信的完成。 手机的扬声器可以通过控制现有的音调信号产生电路进行音调拨打声音。 因此，移动无线电话机能够通知操作者数据通信的完成，而不需要专门用于此目的的附加音频信号发生电路。
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公开(公告)号：US4823373A
公开(公告)日：1989-04-18
申请号：US109021
申请日：1987-10-16
申请人： Chusei Takahashi , Tadashi Amakasu , Hiroshi Etoh
发明人： Chusei Takahashi , Tadashi Amakasu , Hiroshi Etoh
CPC分类号： H04W88/02
摘要： A line switching control system effects switching between a data communication mode and a voice communication mode in mobile communication, particularly mobile telephone service. The line switching control system includes a transmitter/receiver unit for transmitting and receiving signals through an antenna, an input device combined with a telephone, a switching device for effecting switching between the data communication mode and the voice communication mode, and a control unit for controlling switching between the data communication mode and the voice communication mode based on a mode switching command entered through the input device. When a key of the input device at the user's hand is depressed, switching between the data communication mode and the voice communication mode can smoothly be performed.
摘要翻译： 线路切换控制系统在移动通信，特别是移动电话服务中实现数据通信模式和语音通信模式之间的切换。 线路切换控制系统包括用于通过天线发送和接收信号的发射机/接收机单元，与电话组合的输入设备，用于在数据通信模式和语音通信模式之间切换的切换设备，以及用于 基于通过输入设备输入的模式切换命令，控制数据通信模式和语音通信模式之间的切换。 当用户的手上的输入设备的键被按下时，数据通信模式和语音通信模式之间的切换可以顺利地进行。
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公开(公告)号：US4779274A
公开(公告)日：1988-10-18
申请号：US900628
申请日：1986-08-26
申请人： Chusei Takahashi , Hiroshi Etoh
发明人： Chusei Takahashi , Hiroshi Etoh
摘要： A request repeat system for data communication in which the receiving station transmits a signal indicating the result of reception of data transmitted thereto from the transmitting station. The receiving station transmits a signal indicating the unsatisfactory data reception repeatedly N times at the maximum until the receiving station is able to receive the data normally to request the transmitting station to transmit the data again, when the receiving station does not receive the data in a prescribed time after the receiving station has transmitted the signal indicating the unsatisfactory reception of the data to the transmitting station. Thus, the request repeat system eliminates useless communication charge necessary for restarting data communication after interruption and repetition of operation for requesting the repeated transmission of data, and hence the request repeat system is particularly effectively applicable to mobile data communication.
摘要翻译： 一种用于数据通信的请求重复系统，其中接收站从发送站发送指示从其发送的数据的接收结果的信号。 接收站发送指示不令人满意的数据接收的信号，最多重复N次，直到接收站能够正常地接收数据，以请求发送站再次发送数据，当接收站没有接收到数据时 在接收站已经将指示数据不满意的信号发送到发送站之后的规定时间。 因此，请求重复系统消除了在中断和重复执行数据重复传输的操作之后重新启动数据通信所需的无用通信费用，因此请求重复系统特别有效地适用于移动数据通信。
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公开(公告)号：USD338461S
公开(公告)日：1993-08-17
申请号：US833721
申请日：1992-02-11
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