Murata Mfg. Co., Ltd.

Murata Manufacturing Co., Ltd.

Other

Workbit Corporation

Satoshi Sakuragi

Takashi Kuroda

Takeshi Ikeda

Wataru Kakinoki

Tsunekazu Kobayashi

Hiroshi Inoue

Masanori Tsubono

Kenji Hayashikoshi

Masato Minami

Shinji Ushigami

Satoru Inomata

An interface card includes data transmission routes which allow for data transmission in a plurality of data transmission modes and a mode selection switch for selecting a data transmission mode from the plurality of modes. With the interface card, a user is able to select an optimal data transmission mode for the environment.

Interface card including selectable data transmission route modes including first transmission route mode via memory buffer and second transmission route mode not via memory buffer

A communication adapter includes a cable communication signal processing circuit which enables a PDA to have access to a communication network via a cable and a radio communication signal processing circuit which enables a PDA to have access to a communication network via radio waves. The cable communication signal processing circuit and the radio communication signal processing circuit are provided in a single case or on a single board. The cable communication signal processing circuit and the radio communication signal processing circuit operate simultaneously. By attaching the communication adapter to a PDA, the PDA can have access to the communication network via the cable and to make an access to the communication network via the radio waves. Further, the PDA is capable of communicating with the network via the cable and via the radio waves simultaneously.

Communication adapter and network system using the communication adapter

An interface cable allows the number of components and manufacturing costs to be reduced. The interface cable has a housing defining an inner volume which has an opening. A first connector is removably connectable to one of a computer and a portable terminal. The first connector protrudes through the opening in the housing. An interface circuit is coupled to the first connector in which the interface circuit is located within the housing. A cable is coupled to the interface circuit. A second connector is removably connectable to the other of the computer and the portable terminal.

Interface cable

A multilayered ceramic electromagnetic coupler apparatus includes coils formed on ceramic substrates. The coils are laminated and have insulting layers between the ceramic substrates, a modulator section having an oscillator and a demodulator for outputting a transmitted signal.

Multilayered ceramic type electromagnetic coupler apparatus

A data circuit-terminating equipment with a power source device attached thereto comprising a data circuit-terminating device such as a modem system including a power source device for supplying a power extracted from a telephone circuit to the data circuit-terminating device.

Data circuit-terminating equipment with power source device

A data communications system includes a high impedance input circuit, which serves as an input circuit linking between a communications interface and a data terminal equipment, and a power supply circuit which obtains a receiving signal from an input terminal of the high impedance input circuit and draws electric power from the receiving signal to supply to the data communications system.

Data communications system

A modem system includes an RS232C interface; a modulator/demodulator; an input-output device having a parallel interface connected with a data terminal unit having no communication function or having a parallel specification; a parallel-to-serial converter for performing the mutual conversion between parallel data and serial data; a memory for temporally storing the transmitted or recieved data; and a controller for controlling the transmission and reception of data. The modem system can perform the convertion between RS232C specification data and centronix specification data such that a parallel specification printer or plotter having no communication function can be used as an output device for data transmitted to the modem system through the telephone network.

Growing community of inventors

Yokohama, Japan

Satoshi Sakuragi