32results about How to "Less crosstalk" patented technology

A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

The present invention is directed toward a detector structure, detector arrays, a method of detecting incident radiation, and a method of manufacturing the detectors. The present invention comprises several embodiments that provide for reduced radiation damage susceptibility, decreased affects of cross-talk, and increased flexibility in application. In one embodiment, the present invention comprises a plurality of front side illuminated photodiodes, optionally organized in the form of an array, with both the anode and cathode contact pads on the back side. The front side illuminated, back side contact photodiodes have superior performance characteristics, including less radiation damage, less crosstalk using a suction diode, and reliance on reasonably thin wafers. Another advantage of the photodiodes of the present invention is that high density with high bandwidth applications can be effectuated.

This invention is generally concerned with digital-to-analogue converters and more particularly relates to techniques for reducing signal dependent loading of reference voltage sources used by these converters.A differential switched capacitor digital-to-analogue (DAC) circuit (500) comprises first and second differential signal circuit portions (500a,b) for providing respective positive and negative signal outputs with respect to a reference level, and has first and second reference voltage inputs (112,114) for receiving respective positive and negative references. Each of said first and second circuit portions comprises an amplifier (102a,b) with a feedback capacitor (104a,b), a second capacitor (106a,b), and a switch (108a,b, 110a,b) to switchably couple said second capacitor to a selected one of said reference voltage inputs to charge the second capacitor and to said feedback capacitor to share charge with the feedback capacitor. The switch of said first circuit portion is further configured to connect said second capacitor (106a) of said first circuit portion to share charge with said feedback capacitor (104b) of said second circuit portion; and the switch of said second circuit portion is further configured to connect said second capacitor (106b) of said second circuit portion to share charge with said feedback capacitor (104a) of said first circuit portion. This enables the second capacitors to in effect be alternately pre-charged to positive and negative signal-dependent nodes so that, on average, signal dependent loading of the references is approximately constant.

The invention provides a miniaturized sensor device including a thin film membrane having a first surface and a second surface, one or more resistive thin film heater / thermometer devices disposed directly or indirectly adjacent to the first surface of the thin film membrane, and a frame disposed directly or indirectly adjacent to the second surface of the thin film membrane, wherein one or more internal surfaces of the frame define at least one cell having at least one opening. The sensor device also includes a thin film layer disposed directly or indirectly adjacent to the frame. The sensor device further includes a sensing layer disposed directly or indirectly adjacent to the thin film membrane.

There is provided a cable for data transmission which can be wired and constructed without damaging a surface of a wall, ceiling, floor or the like, without using any clamps and which does not degrade appearance of a wired space, and further, allows the wiring construction of the cable provided with a plurality of core wires in a state of less crosstalk. A cable (1) for data transmission includes a core wire (2) having a medium that transmits data and a coating member (4) having adhesiveness and coating at least part of the core wire (2). In this way, because of the adhesiveness of the coating member (4), it is easy to stick the cable onto a wall (6) or the like. Moreover, since a wiring construction of the cable on a surface of the wall (6) or the like without using a clamp, screw or nail is made possible, only the cable is exposed on the surface of the wall (6) or the like and the appearance thereof is improved.

There is provided a mold structure containing a substrate, and a plurality of convex portions formed in the shape of concentric circles at predetermined intervals on one surface of the substrate, wherein a cross-sectional shape of the convex portions with respect to a radial direction of the concentric circles is such that a middle width M of each of the convex portions with respect to a heightwise direction is greater than a width T of a top portion of each of the convex portions with respect to the radial direction of the concentric circles.

There is provided a mold structure containing a substrate, and a plurality of convex portions formed in the shape of concentric circles at predetermined intervals on one surface of the substrate, wherein a cross-sectional shape of the convex portions with respect to a radial direction of the concentric circles is such that a middle width M of each of the convex portions with respect to a heightwise direction is greater than a width T of a top portion of each of the convex portions with respect to the radial direction of the concentric circles.

A clock filter circuit (20), which serves for filtering the clock of non-isochronous data signals having a selected one of at least two nominal data rates, has an auxiliary clock source (21) that generates an auxiliary clock signal (27) with a pulse repetition rate which is in the range between the at least two predetermined data rates, a delay line (22) connected to the auxiliary clock source (21) for creating a set of mutually delayed copies of the auxiliary clock signal and a multiplexer (23) that switches in a cyclic order between the delayed copies according to predetermined rules, which depend on the selected data rate to generate a filtered clock signal (28). A control circuit determines whether the rate of the filtered clock (28) signal must be increased or decreased as compared to said data signal and controls the multiplexer (23) to delay or advance the cyclical switching accordingly.

An object is to provide an organic compound having high heat resistance and a light-emitting element, a light-emitting device, an electronic device, and a display device each having high reliability. Provided are an organic compound having a 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton in which the 2-positions of pyrimidine skeletons are bonded to the 2- and 6-positions of a pyridine skeleton, and having a structure in which at least one aryl group having a fused structure with 10 to 16 carbon atoms is bonded to the 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton, and a light-emitting element, a light-emitting device, an electronic device, and a display device each containing the organic compound.

A novel organic compound that can be used as an electron-injection material or an electron-transport material of a light-emitting element is provided. An organic compound with which a display device having less crosstalk can be obtained is provided. A light-emitting device, a display device, and an electronic device each having less crosstalk are provided. An organic compound including two or three benzo[h]quinazoline rings is provided. In the organic compound, two or three benzo[h]quinazoline rings are preferably included in the substituent including an aromatic ring or a heteroaromatic ring and having 3 to 30 carbon atoms. When two or three benzo[h]quinazoline rings are included in a substituent particularly including a heteroaromatic ring and having 3 to 30 carbon atoms, a high electron-transport property can be obtained.

The invention relates to a multi-fiber core single-mode optical fiber and a manufacturing method thereof. The multi-fiber core single-mode optical fiber comprises claddings and a plurality of fiber cores. The multi-fiber core single-mode optical fiber is characterized in that the fiber cores include a pumping fiber core and a plurality of signal fiber cores, wherein the pumping fiber core is arranged in the center of the optical fiber, the signal fiber cores are distributed on one to three circumferences around the center at equal intervals, so as to form one to three layers of signal fiber cores, sunken claddings tightly cover each signal fiber core, and common claddings are arranged outside the sunken claddings. The multi-fiber core single-mode optical fiber has the characteristics of low signal crosstalk among all of the signal fiber cores, easiness in online light amplification, simplicity and convenience in manufacturing and low manufacturing cost and is suitable for large-scale production. A distributed Raman amplification technique of the multi-fiber core single-mode optical fiber is used in an ultrahigh-speed communication system, so that effective light amplification can be realized, and the harm of a non-linear effect to the performance of a high-speed optical transmission system is further reduced.

A novel organic compound that can be used as an electron-injection material or an electron-transport material of a light-emitting element is provided. An organic compound with which a display device having less crosstalk can be obtained is provided. A light-emitting device, a display device, and an electronic device each having less crosstalk are provided. An organic compound including two or three benzo[h]quinazoline rings is provided. In the organic compound, two or three benzo[h]quinazoline rings are preferably included in the substituent including an aromatic ring or a heteroaromatic ring and having 3 to 30 carbon atoms. When two or three benzo[h]quinazoline rings are included in a substituent particularly including a heteroaromatic ring and having 3 to 30 carbon atoms, a high electron-transport property can be obtained.

A liquid crystal display device is constituted such that sub-pixels are disposed in an array form in a first direction and a second direction orthogonal to each other, a plurality of gate lines are disposed in the second direction, an optical element for distributing the light to the second direction is disposed on the liquid crystal display device, liquid crystal molecules of the liquid crystal display device are controlled by an electric field almost in parallel to the surface of the liquid crystal display device, and a data line is disposed to obliquely divide the sub-pixels at a position different from the boundary between the sub-pixels neighboring in the second direction, where the data line can have a small angle with respect to the second direction, and the numerical aperture is not deteriorated greatly even when the lengths of apertures of the sub-pixels in the first direction are constant.

An improved optical switch utilizes one polarization modulator, with the beam components traversing it twice. Because of the twice traverse, the extinction ratio of the switch is doubled without the addition of another polarization modulator, thus avoiding the costs of additional optical components. With no additional components, the switch is more compact than conventional switches with the same extinction ratio. Fewer components also result in more thermal and long-term stability and less crosstalk.