摘要:
Disclosed is a parallel analog-to-digital converter in which a plurality of comparators are divided into a plurality of groups each consisting of a predetermined number of comparators, and outputs of at least these comparators belonging to the same group are added in an analog or digital fashion. Whether or not the result of addition of the outputs of the comparators exceeds a predetermined threshold level is decided in an analog or digital fashion so as to determine high-order and low-order bits of a digital output signal of the converter on the basis of the result of decision.
摘要:
A parallel (flashed) type analog-to-digital converter is provided which is fabricated on a single integrated-circuit chip. An input analog voltage is compared with respective reference voltages by a number of comparators. A change position of an output pattern (for example, a thermometer format signal) of the comparators is detected by a number of exclusive OR circuits. The exclusive OR circuits are grouped into several groups, and in each group, the output transistors of respective exclusive OR circuits are connected to separate bit lines. Several sets of separate bit lines are connected to one set of output bit lines through emitter followers or diodes so that parasitic capacitances related to the output transistors are reduced.
摘要:
The present invention relates to a process for inhibiting corrosion of an existing steel material built in an inorganic material by applying an aqueous solution of an inorganic salt and a cement composition having corrosion-inhibiting effects on the surface of the inorganic material.
摘要:
The RF power amplifier includes first and second amplifiers Q1 and Q2 as final-stage amplification power devices connected in parallel between an input terminal RF_In and an output terminal RF_Out. The amplifiers Q1 and Q2 are formed on one semiconductor chip. The first bias voltage Vg1 of the amplifier Q1 is set to be higher than the second bias voltage Vg2 of the amplifier Q2 so that the amplifier Q1 is operational between Class B and AB, and Q2 is operational in Class C. The first effective device size Wgq1 of the amplifier Q1 is intentionally set to be smaller than the second effective device size Wgq2 of the amplifier Q2 beyond a range of a manufacturing error of the semiconductor chip. An RF power amplifier that exhibits a high power-added efficiency characteristic regardless of whether the output power is High or Low can be materialized.
摘要:
Embodiments of the invention decrease bending vibrations and torsional vibrations of a voice coil generated by off-plane vibrational forces on the voice coil to reduce noise and to enable a large capacity. In one embodiment, a rotating disk type storage unit comprises a rotating disk recording medium, a head that moves radially relative to the rotating disk recording medium to perform recording or reproduction, a turnable actuator having mounted on one side thereof the head, and a voice coil motor to drive the actuator. The voice coil motor comprises a voice coil mounted on the other side end of the actuator, and a magnet arranged in opposition to the voice coil. A magnet outer periphery of the magnet disposed distant from an actuator turning center is formed to be arcuately concave in shape, and the concave-shaped outer periphery intersects the voice coil.
摘要:
Embodiments of the invention provide a magnetic disk device capable of improving the shielding function for the magnetic head yet maintaining a form factor. In one embodiment, a magnetic disk device comprises a magnetic disk; a magnetic head for recording/reproducing information; a magnetic disk drive mechanism for moving magnetic head in the radial direction of the magnetic disk; a housing including a base and a cover having a nonmagnetic material; and a magnetic shielding member having a magnetic material. The housing has a cut-away portion corresponding to a range in which the magnetic head moves, and the magnetic shielding member is formed in a U-shape including an upper wall portion, a side wall portion and a bottom wall portion. The magnetic shielding member covers the range in which the magnetic head moves, and is disposed in the cut-away portion so as to form substantially the same surface as the surfaces of the upper wall, side wall and bottom wall of the housing.
摘要:
A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage arm includes a suspension fixing portion, first and second arms arranged substantially in parallel with a disk surface, and a restricting member having a surface opposite to the first and second arms. The restricting member and the first arm, and the restricting member and the second arm are coupled via a viscoelastic body.
摘要:
A magnetic disk unit includes a magnetic disk attached to a spindle so as to be rotatable, a slider having a magnetic head for reading/writing data onto/from the magnetic disk, a suspension for providing the slider with a predetermined load, and an actuator arm for positioning the slider attached to the suspension on the magnetic disk. A first pad including the magnetic head and second pads including no magnetic heads are disposed on an air bearing surface of the slider. During rotation of said magnetic disk, a part of the first pad keeps in contact with the magnetic disk. A load point of the suspension with respect to the slider is positioned between a leading edge of the slider and a position located at a distance equivalent to substantially 0.42 times a whole length of the slider from the leading edge of the slider.
摘要:
It is to be made possible to eliminate unevenness of the inductances of bonding wires and to reduce the size of semiconductor devices. Over the surface of a semiconductor device in whose MISFET formation area a MISFET comprising a plurality of unit MISFETs connected in parallel, gate electrode pads electrically connected to the gate electrode of the MISFET and drain electrode pads electrically connected to the drain electrode of the same are arranged in a row each. The intervals of the gate electrode pads become gradually shorter from the end areas towards the central area of the electrode array of the gate electrode pads. The intervals of the drain electrode pads also become gradually shorter from the end areas towards the central area of the electrode array of the drain electrode pads.
摘要:
A magnetic disk device having a head integrated circuit mounted on a magnetic head supporting mechanism. In order to secure the reliability by controlling the integrated circuit temperature below a predetermined level, the difference in the integrated circuit cooling ability which varies with the radial position on the disk is quantified, so that power (signal) sufficient to maintain a constant temperature according to the integrated circuit temperature is supplied to the integrated circuit. Since the cooling ability at a given radial position of the integrated circuit is not exceeded by the power consumption, the integrated circuit temperature can be maintained below a predetermined level.