摘要:
A clock pulse control system for microcomputer systems includes a central processing unit, a plurality of first input/output units, a plurality of second input/output units and a clock pulse generator. The clock pulse generator generates a first clock pulse having a frequency to operate the central processing unit and the first input/output units and a second pulse having the same frequency or a different frequency to operate the second input/output units. Thus, the first input/output units are operated at the same frequency as the central processing unit. The second input/output units are operated by a second clock pulse having an optimum frequency when no information is transferred between the second input/output units and the central processing unit and by a second clock pulse having the operating frequency of the central processing unit when information is transferred between the second input/output units and the central processing unit.
摘要:
A balun circuit includes a first CPW line 11, a second CPW line 12a, and a third CPW line 12b that serve as signal input/output ports; a first CPS line 14a that is a differential transmission line, the first CPS line 14a relaying the first CPW line 11 to the second CPW line 12a; a second CPS line 14b that is a differential transmission line, the second CPS line 14b relaying the first CPW line 11 to the third CPW line 12b; and at least one connection section that connects grounded conductors of each of the first CPW line 11, the second CPW line 12a, and the third CPW line 12b.
摘要:
A supplementary roller is disposed on the end of a disk guiding section 71 so that the outer face 72c of the cylindrical shaped section 72b of the supplementary roller is placed on the conveying roller 73 side by the protruding section 71a formed on disk guiding section 71.
摘要:
A disk device is comprised of a feed roller displacement mechanism which displaces a position of a feed roller 11 to a position lower than a position when a CD 200 is inserted. When a CD 200 is ejected from the turntable, the position of the feed roller 11 displaced downwardly is returned to an initial insertion position.
摘要:
A disc device including a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, and a switch lever, pivotably supported on the holder, for detecting that a disc cartridge is inserted correctly. The slider comprises a wrong-insertion preventing lug projecting inwardly from the slider, which can be engaged in a groove formed on one edge of a disc cartridge when the disc cartridge is inserted into the holder, and the switch level has a free end portion which is positioned outside a free end part of the wrong-insertion preventing lug.
摘要:
Disclosed is an optical semiconductor device includes a multiquantum well structure comprising a well layer and a barrier layer, wherein: the well layer is made of InGaAsP, InGaAs or InGaP; the barrier layer is made of InGaAlAsP, InGaAlAs or InGaAlP; and optionally the well layer has the same In/Ga ratio as the barrier layer and the well layer is compressively strained. Also disclosed is a vapor-phase growth method of a multiquantum well structure comprises a well layer and a barrier layer or further comprises an intermediate layer between the well layer and the barrier layer, comprising the steps of: continuously supplying at a constant flow rate one or several V group gases and one or several first III group gases during the growth of the multiquantum well; forming the well and barrier layer by interrupting the supply of a second III group gas different from the first III group gas; and forming the intermediate layer by varying a flow rate of the second III group gas.
摘要:
A rotational driving apparatus for disks includes a motor mounting base, a motor attached to the motor mounting base, a turn table made of a non-magnetic material and attached to a rotational shaft of the motor, for supporting a disk thereon, a turn table magnet disposed on the turn table, for absorbing the disk placed on the turn table, and a magnetic plate member disposed on the motor mounting base and under the turn table, thereby generating a transverse force exerted on the rotational motor shaft due to a magnetic force of the turn table magnet which acts on the magnetic plate member so as to tilt the rotational motor shaft.
摘要:
A matrix relay is formed with a plurality of latching relays arranged in a matrix and mounted on a base of an electrically insulative material. Each of the latching relays comprises an excitation coil, permanent magnet, a pair of first and second fixed contacts, and an armature carrying a pair of first and second movable springs each providing movable contacts. The armature is magnetically coupled to the excitation coil so as to be movable in response to energization of the coil by current of selective polarity between close and open positions of the fixed and movable contacts. A plurality of the armatures of the latching relays arranged in a row of the matrix are assembled into a single armature block to be mounted on the base as a single unit. The armature block comprises a single pair of first and second supporting members made of an electrically conductive material. All of the first movable springs and all of the second movable springs of the latching relays of the armature block are connected respectively to the first and second supporting members mechanically and electrically, so that two row paths for electrical signals common to the latching relays arranged in the row of the matrix are provided. This simplification of the structure and electric circuit of the matrix relay would be useful to small-size the matrix relay without complicated fabrication process.
摘要:
The present invention provides a process for producing a variety of unsaturated carbamic acid derivatives from corresponding unsaturated carbamates by substitution reaction. The present invention provides a process for producing unsaturated carbamic acid derivatives, comprising reacting an unsaturated carbamate represented by ##STR1## wherein R represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.1 represents a residue of an alcohol from which an OH group is removed,with an alcohol, a primary or secondary amine or an oxime at a temperature of 80.degree. to 150.degree. C. to substitute the --OR.sup.1 group in the formula (A).
摘要:
A hydroxy-terminated linear carbonate is produced by reacting a cyclic alkylene carbonate such as neopentyl glycol carbonate with a substance having at least one alcoholic hydroxyl group in the presence of a catalyst. Mono- or polyhydric alphatic alcohols, polycaprolactone polyols, hydroxyl group-containing acrylic monomers and polymers, and polyester polyols are modified by the reaction with the cyclic alkylene carbonate to have an enhanced reactivity and resistance to hydrolysis.