Hitachi, Ltd.

Other

Toshiaki Murai

Yasuhiro Yamada

Tadashi Hatano

Takeshi Kawana

Tomonao Kikuchi

Takayuki Nakao

Akihiro Hayami

Tomoaki Shimotsu

Tohru Oyama

Tadaaki Fujii

Masayuki Miyoshi

Hidehiro Ikeuchi

Toshio Asano

Sumie Nakabayashi

Naoyuki Sakurai

A temperature compensating circuit includes a first circuit network between an inverting input terminal of an operational amplifier and an output terminal of the operational amplifier , and a second circuit network between the inverting input terminal of the operational amplifier and a reference potential. At least one of the first circuit network and the second circuit network is made of an arrangement containing a plurality of series-connected thermistor/resistor pairs in which the thermistors are connected parallel to the resistors, and the temperature compensating circuit compensates a temperature-dependent signal which is inputted into a positive phase input terminal of the operational amplifier , and outputs the temperature-compensated signal.

Temperature compensating circuit, temperature compensating logarithm conversion circuit and light receiver

A cordless telephone system includes one base station and at least one personal station. Each station includes an abbreviated dial memory for storing abbreviated dial data, a control unit for controlling the telecommunication device, an abbreviated dial transfer unit for selectively transmitting in radio the abbreviated dial data stored in the abbreviated dial memory to another telecommunication device, and a unit for receiving abbreviated dial data transmitted from another telecommunication device and writing the abbreviated dial data into the abbreviated dial memory. By using an empty channel of communication in progress or a control channel which can be freely used by a user, abbreviated dial data are transferred between stations.

Cordless telephone system capable of transmitting abbreviated number

An apparatus for inserting electronic elements comprises: a board positioning means having a pair of rails disposed on an X-Y table, the board positioning means being adapted to fix and position a board which is fed thereto along the rails; an element supply means having a plurality of element supply units each adapted to feed to its element supply position an electronic element to be inserted in the board, the element supply units being arranged such that their element supply positions are placed in one or a plurality of rows; a plurality of chucks each formed such as to correspond to the configuration and size of the associated electronic elements to be inserted; an inserting head having a holder mechanism and adapted to detachably support one of the chucks by the holder mechanism and to reciprocatively move between a chuck exchanging position and element supply and insertion positions; and a chuck exchanging means including a chuck unit in which the chucks are arranged on an index-movable plate and a chuck exchanging unit which is adapted to actuate the holder mechanism of the inserting head thereby to load and unload the chuck.

Apparatus for inserting electronic elements

An apparatus for inserting electronic elements comprises means for supplying electronic elements, means for cutting to different lengths a plurality of lead wires extended in the same direction from the body of an electronic element supplied by the electronic element supply means, a chuck mechanism for holding the body of the electronic element with the lead wires thereof cut to different lengths by the cutting means, means for changing the direction of the lead wires with respect to insertion holes by swivelling the chuck mechanism by a predetermined angle around an axis perpendicular to the plane of a printed circuit board, an insertion head including insertion means for inserting the lead wires into the insertion holes by moving the chuck mechanism vertically with respect to the printed circuit board, an index table for moving the insertion head stepwise from at least a lead wire forward end position measuring station to a lead wire insertion station, means for measuring the forward end position of each lead wire of the electronic element held by the chuck mechanism of the insertion head at the lead wire forward end position measuring station, and means for correcting the positions of the insertion holes of the printed circuit board by moving it along X and Y axes in accordance with the forward end positions of the lead wires measured by the measuring means at the lead wire insertion station. The lead wires are inserted into the insertion holes associated therewith in descendent order of the length of the lead wires sequentially.

Growing community of inventors

Yokohama, Japan

Toshiaki Murai