摘要:
Unit cells and separator elements are stacked in layers, thus constituting a stacked structure of a fuel cell. A first segment channel, which is bored through the peripheral region of each separator element, communicates with a second segment channel formed in a cylindrical seal member which is joined to each two adjacent separator elements. Thus, manifolds for the intake and exhaust of a fuel gas and an oxidant gas are defined. The cylindrical seal member includes a pair of ring-shaped metal members joined to each two adjacent separator elements and a ring-shaped insulating member interposed between the metal members. Thus, the gases in the manifolds can be prevented from leaking out, and the adjacent separator elements are insulated from one another.
摘要:
A fluid compressor having a rotational force transmitting mechanism. The mechanism comprises an Oldam portion, an Oldam ring and a second cylinder gearing. The Oldam portion is integral with a piston. The Oldam ring has a first pair of key grooves and a second pair of key grooves. The key grooves of the first pair extend at right angles to those of the second pair. The second cylinder bearing is fitted in the cylinder and has two projections fitted in the key grooves of the second pair. The Oldam ring is made of silicon nitride ceramic.
摘要:
A T/R switch applicable to an ultrasonograph and capable of transmitting a signal reflected from a living body over a wide band with low noise without causing erroneous operation of the switch or element destruction even when the potential of a transmission signal or reflected signal changes includes: a common source terminal commonly and serially coupling the source terminals of two MOS transistors; a common gate terminal commonly coupling the gate terminals of the two MOS transistors; a main switch, the drain terminals of which are connected to input/output terminals; and a floating voltage circuit which is connected to the common gate terminal and common source terminal, makes the common gate terminal potential follow, in phase, variation in the common source terminal potential, and sends a signal to turn the switch on or off to the common gate terminal.
摘要:
A variable gain amplifier of such configuration that can yield continuously and log-linearly variable gains in relation to control voltage and, at the same time, that does not use an attenuator, an element which otherwise would entail cause of increased noise. The amplifier includes a plurality of gm amplifiers connected in parallel with input signal, exponential multipliers connected respectively to the gm amplifiers, a control section to vary the multiplication coefficient of the exponential multipliers according to the external gain control signal, and an I-V converter circuit to aggregate current output after multiplication and convert the aggregated current output to voltage. A continuously variable gain characteristic can be obtained without the use of an attenuator but by varying multiplication coefficient according to control voltage.
摘要:
The present invention provides a disk storage system with a low error rate, which is suitable for reduction in size. The other end of the signal line, which is connected with a read head at one end, is connected with a head bias circuit to apply a sense current to the read head and a pair of first and second capacitance elements for allowing the read signal element formed by the read head to pass, a loop is provided for amplifying the read signal obtained through the first and second capacitance elements by supplying the read signal to an input terminal of a differential amplifying circuit and for converting the amplified signal into the current by transconductance and providing a positive feedback of the amplified signal to the input terminal of the differential amplifying circuit.
摘要:
A magnetic head driving circuit includes a main driving circuit symmetrical with respect to a centered recording coil, and at least two pairs of adding circuits, each pair including a positive pulse adding circuit and a negative pulse superposed circuit symmetrical with respect to the centered coil. And, by reversing the direction of the magnetic head coil current, at least one of the adding circuits is made to operate and make it as a magnetic head driving circuit for adding a potential equal to or higher than the power supply, thereby to drive as a sub-driving circuit arranged symmetrically with respect to the centered coil, which promotes the reversal of the magnetic head coil current, and which drives stably with a central potential of the coil at about the disk potential.
摘要:
In a fuel protective apparatus having a fuel assembly, the fuel protective apparatus is hoisted up by using a hoisting accessory. The fuel protective apparatus includes a fuel protective container for housing the fuel assembly. The fuel protective container has an opening portion to which the hoisting accessory is accessed. An attachment jig member is fixedly secured to the fuel protective container so as to be engaged to the hoisting accessory accessed to the opening portion.
摘要:
With an ultrasound pulser suitable for application to a medical ultrasound system, and so forth, a high voltage power supply of a transducer drive circuitry, on both high potential and low potential sides, is rendered variable in a range of 0 V on the order of ±200 V, thereby implementing a semiconductor integrated circuit wherein a plurality of the ultrasound pulsers corresponding to a plurality of channels, respectively, are integrally formed on a small area. The ultrasound pulser has a configuration wherein, in a MOSFET gate drive circuitry, an input voltage pulse is converted into a current pulse, and the current pulse is converted again into a voltage pulse on the basis of a high potential side voltage +HV, and a low potential side voltage −HV, applied to a transducer drive circuitry, whereupon voltage level shift in the input voltage pulse is attained, and a voltage pulse swing of an output buffer of the MOSFET gate drive circuitry receiving a shifted voltage pulse is generated by the MOSFET gate drive circuitry similarly on the basis of the high potential side voltage +HV, and the low potential side voltage −HV, applied to the transducer drive circuitry. The MOSFET gate drive circuitry is DC-coupled with the transducer drive circuitry.
摘要:
With an ultrasound pulser suitable for application to a medical ultrasound system, and so forth, a high voltage power supply of a transducer drive circuitry, on both high potential and low potential sides, is rendered variable in a range of 0 V on the order of ±200 V, thereby implementing a semiconductor integrated circuit wherein a plurality of the ultrasound pulsers corresponding to a plurality of channels, respectively, are integrally formed on a small area. The ultrasound pulser has a configuration wherein, in a MOSFET gate drive circuitry, an input voltage pulse is converted into a current pulse, and the current pulse is converted again into a voltage pulse on the basis of a high potential side voltage +HV, and a low potential side voltage −HV, applied to a transducer drive circuitry, whereupon voltage level shift in the input voltage pulse is attained, and a voltage pulse swing of an output buffer of the MOSFET gate drive circuitry receiving a shifted voltage pulse is generated by the MOSFET gate drive circuitry similarly on the basis of the high potential side voltage +HV, and the low potential side voltage −HV, applied to the transducer drive circuitry. The MOSFET gate drive circuitry is DC-coupled with the transducer drive circuitry.
摘要:
In a fuel transport container, basket has a basket hole including at least two adjacent inner side walls to be fit to a fuel assembly for housing the fuel assembly element in the basket hole. The fuel assembly element is directly housed in the basket hole of the basket. The fuel assembly housed in the basket hole is slid by bias means toward the two adjacent inner side walls thereof without pushing the fuel assembly thereby biasing the housed fuel assembly so that the fuel assembly element is in contact with the two adjacent inner side walls of the basket hole.