摘要:
Provided is a wavelength selective switch (WSS), and more particularly, a wavelength selective switch for electrically switching a wavelength without physical displacement. The wavelength selective switch includes an optical demultiplexer for dividing an input optical signal into signals having wavelengths corresponding to respective channels, selecting either the optical signal of each channel obtained by dividing the input optical signal or an optical signal input via an add port, and outputting the selected optical signal; and an optical multiplexer including an optical deflecting unit for individually deflecting the optical signals of the respective channels received from the optical demultiplexer according to supplied current or applied voltage, wherein the optical signal of each channel deflected by the optical deflecting unit is output to a specific output port. In the wavelength selective switch, current is supplied to the optical deflectors to switch the channels, resulting in higher reliability, smaller volume and higher switching speed than a conventional wavelength selective switch using mechanical displacement to switch channels.
摘要:
A The CMOS image sensor includes a pixel array including pixels arranged in a matrix of rows and columns and a row selection unit configured to generate selection signals for simultaneously or concurrently selecting at least two rows from the rows of the pixel array in response to a received row address. An analog-to-digital conversion unit is configured to convert pixel data output from the at least two rows selected from the pixel array into a digital video signal and output the digital video signal. The pixel array outputs the pixel data in response to the selection signals.
摘要:
Provided is a method for manufacturing a planar buried semiconductor optical amplifier in which a spot size converter with a double-core structure is integrated, comprising the steps of: after growing a lower cladding layer, a lower waveguide layer and an upper cladding layer on a substrate, patterning a portion of thickness of the lower cladding layer, the lower waveguide layer and the upper cladding layer through an etching process using a dielectric layer pattern to form a lower waveguide; growing a planarization layer on the etched portions of the lower cladding layer, the lower waveguide layer and the upper cladding layer to smooth a surface; after removing the dielectric layer pattern, growing a space layer, an upper waveguide layer and a first cladding layer on the overall upper surface; patterning the first cladding layer, the upper waveguide layer and the space layer through the etching process using the dielectric layer pattern to form an upper waveguide having a horizontal taper area; after growing a first current blocking layer on the etched portions of the first cladding layer, the upper waveguide layer and the space layer of the upper waveguide, growing a second current blocking layer on the exposed portion of the first current block layer excluding the dielectric layer pattern; and after removing the dielectric layer pattern, forming a second cladding layer on the overall upper surface, and forming an electrode on the second cladding layer and the substrate, respectively.
摘要:
The present invention provides a relative humidity and condensed water estimator for a fuel cell and a method for controlling condensed water drain using the same. Here, the relative humidity and condensed water estimator is utilized in control of the fuel cell system involving control of anode condensed water drain by outputting at least two of signals comprising air-side relative humidity, hydrogen-side relative humidity, air-side instantaneous or cumulative condensed water, hydrogen-side instantaneous or cumulative condensed water, instantaneous and cumulative condensed water of the humidifier, membrane water contents, catalyst layer oxygen partial pressure, catalyst layer hydrogen partial pressure, stack or cell voltage, air-side catalyst layer relative humidity, hydrogen-side catalyst layer relative humidity, oxygen supercharging ratio, hydrogen supercharging ratio, residual water in a stack, and residual water in a humidifier.
摘要:
A data sampler and a photo detecting apparatus compensate a reference signal with offset information measured from a unit pixel, and compare an offset-compensated reference signal with a data signal, thereby minimizing the impact of an offset occurring with an increase of gain in the data sampler.
摘要:
A sense amplifier having a negative capacitance circuit receives differential input signals via a pair of data lines, and senses and amplifies a voltage difference between differential output signals corresponding to the differential input signals as loaded by the negative capacitance circuit using a differential-to-single-ended amplifier to generate a corresponding data output signal.
摘要:
A power supply unit for robots and a robot having the same. The power supply unit for robots supplies power to actuators installed within an arm, and includes a housing provided with at least two lines of bus bars in an inner reception space; and at least one power unit to branch off power transmitted to the bus bars through power supply lines.
摘要:
The present invention provides a pulverizing screw, a pulverizing casing and a pulverizer having the same. The pulverizing screw includes a rotating shaft and a drive blade which extends from the rotating shaft in a spiral shape. The drive blade rotates in the pulverizing casing in such a manner as to maintain a predetermined distance between the drive blade and the inner surface of the pulverizing casing to prevent the drive blade from being impeded by the inner surface of the pulverizing casing. The drive blade extends from a first end of the rotating shaft in a spiral shape surrounding the rotating shaft in a clockwise or counterclockwise direction and is connected to a second end of the rotating shaft. The pulverizing casing comprises a spherical body having a space therein. The pulverizing screw is installed in the spherical body so as to be rotatable.
摘要:
A The CMOS image sensor includes a pixel array including pixels arranged in a matrix of rows and columns and a row selection unit configured to generate selection signals for simultaneously or concurrently selecting at least two rows from the rows of the pixel array in response to a received row address. An analog-to-digital conversion unit is configured to convert pixel data output from the at least two rows selected from the pixel array into a digital video signal and output the digital video signal. The pixel array outputs the pixel data in response to the selection signals.
摘要:
A correlated double sampling circuit includes a delta-sigma modulator, a selection circuit, and an accumulation circuit. The delta-sigma modulator is configured to receive an input signal, delta-sigma modulate the input signal, and output a modulation signal. The selection circuit is configured to invert the modulation signal and selectively output one of the modulation signal and an inverted modulation signal in response to a selection signal corresponding to an operation phase. The accumulation circuit is configured to generate a first accumulation result by performing an accumulation process on one of the modulation signal and the inverted modulation signal in a first operation phase, and generate a second accumulation result by performing the accumulation process on the first accumulation result and the other one of the modulation signal and the inverted modulation signal in a second operation phase.