摘要:
Provided are a method of fabricating a semiconductor and an apparatus using the method, and more particularly, a method of effectively arranging assist features on the mask and an apparatus using the method. The method of arranging mask patterns includes separately calculating contributions of an assist feature to image intensity at an optimal focus and at a defocus position and placing the assist feature at a position where the contribution of the assist feature to the image intensity is greater at the defocus position than at the optimal focus position. The method includes a first operation of obtaining a first contribution function for contribution of an assist feature to image intensity at a main feature at a first focus position; a second operation of obtaining a second contribution function for contribution of the assist feature to the image intensity at the main feature at a second focus position; and a third operation of determining the position of the assist feature to be a position satisfying a condition that a linear combination of the first contribution function and the second contribution function exceeds a predetermined threshold value.
摘要:
Provided is a method for generating a preamble sequence group. The method includes creating a preamble sequence, calculating a cross-correlation value between sequences using the created preamble sequence, determining a limit cross-correlation value using the cross-correlation value to construct a preamble set used in the communication system, calculating a preamble set that satisfies the determined limit cross-correlation value, and terminating construction of the preamble set.
摘要:
A bar-type vibration motor has a stator unit including a body and a magnet attached in the body; a rotor unit including a rotary shaft having one end fixed to an eccentric weight and the other end fixed to a stationary member, a portion of the rotary shall adjacent to the eccentric weight being rotatably supported by the body like a cantilever, a commutator having several segments attached on one side of the stationary member, and an armature fixed to the stationary member spaced apart from the magnet, and electrically connected with the commutator; and a power supply unit including a fixing cap faxed to the body and a brush mounted on the fixing cap to supply voltage to the armature.
摘要:
Disclosed is a refrigerator having a dispenser comprising: a dispenser case mounted at one side of a refrigerator door; a cold water faucet and a hot water faucet provided in the dispenser case and from which cold water and hot water are supplied; and a dispenser door for opening and closing the dispenser case. In this construction, a hot water button is prevented from being pressed by a child by mistake and thus a child is prevented from getting burned by hot water from the hot water faucet, thereby enhancing a stability. Also, when a cup or a container becomes hot while or after the user gets hot water from the hot water faucet in the cup or the container, the cup or the container can be placed on the dispenser door thereby to enhance the user's convenience.
摘要:
Disclosed is a method and an apparatus for transmitting/receiving signals in an multiple input multiple output (MIMO) wireless communication system. The method and apparatus including beam forming of a reference signal while predetermined codes are mapped on a one-to-one basis to each of a plurality of beams available for the transmitter and thereafter transmitting the beam-formed reference signal to a receiver. Also, if information representing an optimum beam, which maximizes reception performance, is received from the receiver, beam forming of data signals is performed by means of a beam corresponding to the information on the optimum beam and the beam-formed data signals are transmitted to the receiver. Therefore, it is possible to apply a beam forming scheme having minimum operation complexity and maximizing reception performance.
摘要:
Interferometer systems for measuring displacement include a displacement interferometer. This interferometer includes a displacement converter responsive to a measuring beam of light. The displacement converter is configured to transform movement thereof in a direction orthogonal to the measuring beam of light into a change in path length between a reflective surface of the displacement converter and the measuring beam of light. The displacement converter may include a transmission grating and a displacement mirror or a reflecting grating.
摘要:
An apparatus and method for performing beamforming for transmitting a plurality of bit streams output through Adaptive Modulation and Coding (AMC) via a plurality of transmission antennas in a base station using a multi-antenna scheme. The apparatus and method include classifying the plurality of transmission antennas into a plurality of transmission antenna groups; selecting one of the transmission antenna groups depending on a group selection signal being fed back from a mobile station; and outputting each of the bit streams to its associated transmission antenna among the transmission antennas constituting the selected transmission antenna group.
摘要:
In a silicon substrate having a contact hole in a device region, the contact resistance between the contact plug and the silicon substrate is reduced by preventing formation of an undesirable layer therebetween by treating the exposed surface of the substrate before forming the contact plug. Further, a two-layered contact plug consisting of a first contact plug layer having high impurity concentration and a second contact plug layer having low impurity concentration, on the interlayer insulating film including the exposed surface of the substrate. The interface between the silicon substrate and the contact plug is thermally treated at low temperature, and the first contact plug layer having high impurity concentration and the second contact plug layer having low impurity concentration, are formed, so that the resistance between the silicon substrate and the contact plug can be reduced, thereby increasing the operation speed of the device. thereby increasing the operation speed of the device.
摘要:
An adaptive equalizer includes a recording density detector for calculating a recording density reference value by obtaining the track radius using input track information, a reference tap coefficient storage portion for storing the reference tap coefficient obtained according to the channel impulse response at the lowest density position, a tap coefficient controller for obtaining a tap coefficient according to the recording density using the recording density reference value on the basis of the reference tap coefficient stored in the reference tap coefficient storage portion, and a waveform equalizer for eliminating the interference of the signal adjacent to the input reproducing digital signal using the tap coefficient obtained from the tap coefficient controller, to output the reproducing information signal. Therefore, the recording density is assumed by the track information of the reproduced data and the reproduction signal is adaptively waveform-equalized, so that high-speed real-time processing is possible and the circuit construction can be simplified.