Nihon Medi-physics Company, Limited

Mitsubishi Denki Kabushiki Kaisha

Jun Takahashi

Nobuo Ueda

Makoto Azuma

Hirohiko Yamauchi

Shinsuke Tanaka

Tomohisa Wada

Toru Shiomi

Shigemi Seri

Hiroaki Matsushima

Mitsuhisa Iinuma

Sakae Okano

A semiconductor memory device includes a plurality of sense amplifiers for amplifying current changes which occur in corresponding bit line pairs in accordance with binary signals stored in activated memory cells. Each of the sense amplifiers includes first and second current mirror circuits for generating currents of the magnitudes respectively corresponding to currents flowing through a corresponding bit line pair, a storing circuit, responsive to a signal selecting a memory cell, for storing the currents generated by the first and second current mirror circuits before activation of the memory cell, or a difference between these currents, and a current supplying circuit, responsive to activation of the memory cell and based on the amount stored in the storing circuit, for supplying, to the first and second current mirror circuits, currents having a predetermined relationship with the currents having been generated by the first and second current mirror circuits before activation of the memory cell. A current change corresponding to data stored in the selected memory cell and not affected by an offset occurs in a connection node between the first current mirror circuit and the current supplying circuit, or a connection node between the second current mirror circuit and the current supplying circuit.

Semiconductor memory device

An input buffer circuit applicable as a BiCMOS RAM address buffer is disclosed. An improved level shift circuit 59 includes PMOS transistors 14 and 17 for bypassing emitter follower transistors 12 and 15, and NMOS transistors 13 and 16 for constituting a controllable current source Two differential amplifier circuits operating in response to an input signal having an ECL logic amplitude are provided, and emitter follower transistors 12 and 15 are driven by one of them, MOS transistors 13, 14, 16, and 17 are driven by the other. High operating speed is achieved under less current consumption, since emitter follower transistors 12 and 15, and MOS transistors 13, 14, 16, and 17 are driven, respectively.

BiCMOS input buffer circuit operable at high speed under less power

A non-radioactive labeling composition for preparation of a technetium 99m-labeled radioactive diagnostic agent, which comprises a small amount of a lyophilized product obtained from a stannous chloride solution having a high concentration of stannous chloride charged in a container.

Stable stannous chloride composition for labeling with radioactive

A polyaminedithiol compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.11 and R.sub.12 are each a lower alkyl group, R.sub.21 is a hydrogen atom or a lower alkyl group, and R.sub.3 and R.sub.13 are each a hydrogen atom or a nitrogen-containing organic group, provided that at least one of R.sub.3 and R.sub.13 is a nitrogen-containing organic group, which is used for imaging of the regional cerebral blood flow.

Chelating compounds and their use

A kit for the administration of a radiopharmaceutical liquid composition has been developed, which includes a radiation-shielding injector accompanied with a syringe-type vial having a gasket therein, a seal cap and a plunger to be engaged with the gasket. The injector is made of a radiation-shielding tubular metal body covered with a plastic material having an exit at the bottom, the body being further provided with a lead glass window on its curved surface, a packing engaging the inside surface at one end of the body and a pair of wings having skid-proof ridges formed on at least one surface thereof, the wings being located at one end of the body. The body is so designed as to be shorter than the tubular portion of the syringe-type vial to be inserted therein, whereby the rear portion of the vial protrudes a little from the tubular body when the same is inserted into the body.

Radiation-shielding injector for a radio-pharmaceutical liquid

A radiation-shielding container comprising an outer plastic tube, an inner radiation-shielding metal tube inserted into the outer tube and a top plastic cap accompanied with a plug made of a radiation-shielding metal on its back and a bottom plastic cap, wherein the top and the bottom caps attach to the uppermost and the lowermost edges, respectively of the plastic outer tube in a snap-on method or a screwed or threading method, have respectively a peripheral thin section on the curved surface and are so designed that they can not be removed from the outer tube unless the thin section of the cap is cut off or that the thin section is forcibly opened.

Growing community of inventors

Hyogo, Japan

Jun Takahashi