摘要:
An exhaust gas purifying filter for removing carbon particles from combustion exhaust gas, having a honeycomb structural body, flow passages that are sealed alternately at both ends by means of sealing portions to form checkerboard patterns. In the exhaust gas purifying filter according to the invention, lengths of the sealing portions formed in the flow passages of the honeycomb structural body vary randomly. An exhaust gas purifying apparatus utilizing the exhaust gas purifying filter according to the invention is also disclosed.
摘要:
In a driver circuit for driving a pair of data lines, the amplitude of a differential input signal is reduced from 2.5 V to 0.6 V, which is smaller than a conventional lower-limit source voltage (approximately 1.5 V). The amplitude of the differential signal transmitted through the pair of data lines is amplified to 2.5 V by an amplifying circuit and the resulting signal is then latched by a latch circuit. After the latching by the latch circuit, the operation of the amplifying circuit is halted. The driver circuit is constituted solely by a plurality of NMOS transistors so as not to increase a leakage current flowing in the off state. Here, the threshold voltage of the NMOS transistor positioned on the ground side is reduced to a conventional lower-limit value (0.3 V to 0.6 V), while the threshold voltage of the NMOS transistor on the power-source side to a value lower than the above lower-limit value (0 V to 0.3 V), thereby enhancing a driving force of the NMOS transistor on the power-source side.
摘要:
In a semiconductor memory device comprising memory cells in which first and second potentials correspond to the logic values "0" and "1", the first potential is closer to the second potential than the potential of unselected word lines, by 0.3 V or more. The pull-up transistor is of the N-type, and the pull-down transistor is of the P-type.
摘要:
An exhaust gas recirculation device for an internal combustion engine has a filter for trapping particulates in a recirculation gas, which is arranged in a recirculation gas route, and a device for generating a reverse air flow in which a pure gas flow for the reverse air flow passing through said filter in a reverse direction with respect to a recirculation gas flowing direction in the filter is generated. In the exhaust gas circulation device, the trapped gases are discharged out of the filter by the reverse air flow and are not returned into the internal combustion engine due to an engine exhaust pressure.
摘要:
A reference voltage generator is composed of a first constant-voltage generator consisting of three p-type MOS transistors for generating a first reference voltage Vref for use in the normal operation, which is independent of an external power-supply voltage VCC and of a second constant-voltage generator consisting of two p-type MOS transistors and one n-type MOS transistor for generating a second reference voltage Vrefbi for use in a burn-in acceleration test, which is dependent on VCC. The output of each of the constant-voltage generators is feedbacked to the other constant-voltage generator as its input. Two differential amplifiers and two output drivers output, as an internal reduced voltage Vint, the higher one of Vref and Vrefbi which are outputted from the reference voltage generator. Since Vint is generated based on the two outputs Vref and Vrefbi which are outputted from the single reference voltage generator and which are related to each other, the power consumption and layout area of an internal reduced-voltage generator, which is suitable for the burn-in, can be reduced.
摘要:
In a driver circuit for driving a pair of data lines, the amplitude of a differential input signal is reduced from 2.5 V to 0.6 V, which is smaller than a conventional lower-limit source voltage (approximately 1.5 V). The amplitude of the differential signal transmitted through the pair of data lines is amplified to 2.5 V by an amplifying circuit and the resulting signal is then latched by a latch circuit. After the latching by the latch circuit, the operation of the amplifying circuit is halted. The driver circuit is constituted solely by a plurality of NMOS transistors so as not to increase a leakage current flowing in the off state. Here, the threshold voltage of the NMOS transistor positioned on the ground side is reduced to a conventional lower-limit value (0.3 V to 0.6 V), while the threshold voltage of the NMOS transistor on the power-source side to a value lower than the above lower-limit value (0 V to 0.3 V), thereby enhancing a driving force of the NMOS transistor on the power-source side.
摘要:
An apparatus for bending a band-shaped work, the apparatus including a stationary cylinder having at least a pair of slits on diametrically opposite sides thereof, the slits providing a passageway in which the work is inserted through the slits, a rotary sleeve accepting the stationary cylinder with a gap interposed therebetween, the rotary sleeve having a first opening and a second opening on diametrically opposite sides thereof, a first driving means for feeding the work passed through the passageway in the stationary cylinder and the first and second openings of the rotary sleeve, and a second driving means for rotating the rotary sleeve by a predetermined amount while the movement of the work is stopped so as to bend the work between the stationary cylinder and the rotary sleeve.
摘要:
A ceramic honeycomb catalyst includes a thin-walled honeycomb structural body (10) and a catalytic substance carried by the honeycomb structural body (10). The honeycomb structural body (10) has a number of longitudinally extending flow passages (13) defined by an outer peripheral wall (11) and partition walls (12) with a reduced thickness (t). The honeycomb structural body (10) satisfies particular relationships between the partition wall thickness (t) and the open frontal area (OFA) or bulk density (G). Notwithstanding the thin-walled partition walls, the honeycomb structural body (10) has practically satisfactory compressive strength characteristics. The catalyst comprising the honeycomb structural body (10) has reduced pressure loss and heat capacity.
摘要:
An isolation and flattening technique for a semiconductor substrate having active devices, such as a bipolar transistor, and a MISFET, formed thereon, is disclosed. The technique includes forming grooves, to the main surface of a non-active region of a semiconductor substrate or a semiconductor layer, each groove extending into the substrate or layer and forming island regions of the substrate or layer, forming a burying material and a first mask having an etching rate greater than that of the burying material successively over the entire surface of the semiconductor substrate or the semiconductor layer including areas on the upper surface of the island regions and in the grooves, such that the film thickness is made virtually uniform for each of the surfaces, forming a second mask on the surface of the first mask, through which the region on each of the island regions is exposed and in which the end of the opening is situated from the end of the island region to the outside of the island region within a distance 0.7 times of the film thickness for the sum of the burying material and the first mask, and applying isotropic etching successively to each of the first mask and the burying material by using the second mask as an etching mask, under a condition in which the etching rate for the first mask is greater than that for the burying material.
摘要:
In a substrate potential generator, a substrate potential is supplied by a substrate potential supplier controlled by a substrate potential detector. The substrate potential detector sends a setting signal having a hysteresis characteristic relative to the substrate potential. That is, the setting signal is higher when the substrate potential supplier is stopped than when the substrate potential supplier is activated or when negative charges are injected into the substrate potential. Thus, the operation of the substrate potential supplier is stopped after the substrate potential becomes lower than the lower setting potential when the substrate potential supplier is activated, while the operation of the substrate potential supplier is started after the substrate potential becomes higher than the upper setting potential after the operation of the substrate potential supplier is stopped. Therefore, the starting and stopping of the substrate potential supplier is not repeated so frequently, so that the dissipating charge and discharge currents accompanied with the starting and stopping will not be enhanced wastefully.