公开(公告)号：US07961798B2

公开(公告)日：2011-06-14

申请号：US11989620

申请日：2006-11-30

申请人： Yong Il Jun

发明人： Yong Il Jun

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2608

摘要： Wired/wireless optical signal modulation and demodulation apparatuses and methods using an intensity modulation/direct detection method and an orthogonal frequency division multiplexing (OFDM) method are provided. A unipolar OFDM symbol frame is generated by determining the polarity of each of a plurality of sub-frames of a bipolar OFDM symbol frame which comprises both a plurality of positive pulses and a plurality of negative pulses, inverting the polarity of the sub-frames which are determined to be negative, delaying one of the positive sub-frame and a positive sub-frame obtained through the inversion by the duration of the sub-frames, and multiplexing the result of the delaying and whichever of the positive sub-frame and the positive sub-frame obtained through the inversion is not the result of the delaying. The unipolar OFDM symbol frame can guarantee high power amplification efficiency and high transmission power efficiency, and is robust against a multi-path channel environment. Therefore, the unipolar OFDM symbol frame can be used in various optical signal modulation/demodulation methods for wireless indoor broadband optical transmission devices, wired broadband optical transmission devices using multi-mode optical fibers, and radio-over-fiber devices which transmit baseband analog signals as optical signals.

摘要翻译： 提供了使用强度调制/直接检测方法和正交频分复用（OFDM）方法的有线/无线光信号调制和解调装置和方法。 通过确定包括多个正脉冲和多个负脉冲的双极性OFDM符号帧的多个子帧中的每一个子帧的极性来产生单极OFDM符号帧，从而反转子帧的极性， 被确定为负值，将通过反转获得的正子帧和正子帧中的一个延迟子帧的持续时间，并且将延迟的结果和正的子帧和 通过反演获得的正子帧不是延迟的结果。 单极OFDM符号帧可以保证高功率放大效率和高发射功率效率，并且对于多径信道环境是鲁棒的。 因此，单极OFDM符号帧可以用于无线室内宽带光传输装置，使用多模光纤的有线宽带光传输装置以及发射基带模拟信号的无线电光纤装置的各种光信号调制/解调方法 作为光信号。

公开(公告)号：US20100142115A1

公开(公告)日：2010-06-10

申请号：US12499762

申请日：2009-07-08

申请人： Hyun-Cheol Bae ,  Kwang-Seong Choi ,  Ju Yeon Hong ,  Jong Tae Moon ,  Yong il Jun

发明人： Hyun-Cheol Bae ,  Kwang-Seong Choi ,  Ju Yeon Hong ,  Jong Tae Moon ,  Yong il Jun

IPC分类号： H01G5/00 ,  H01G7/00 ,  B32B38/04

CPC分类号： H01G4/30 ,  H01G4/232 ,  H01G4/38 ,  H01G4/40 ,  H05K1/0206 ,  H05K1/0306 ,  H05K1/162 ,  H05K3/4629 ,  H05K2201/0187 ,  H05K2201/09672 ,  H05K2201/0969 ,  H05K2203/171 ,  Y10T29/43 ,  Y10T156/1056

摘要： Provided are a buried capacitor, a method of manufacturing the same, and a method of changing a capacitance thereof. The buried capacitor includes an upper electrode including at least one first hole, a lower electrode including at least one second hole, and a dielectric interposed between the upper electrode and the lower electrode.

摘要翻译： 提供一种埋电容器，其制造方法和改变其电容的方法。 掩埋电容器包括上电极，其包括至少一个第一孔，包括至少一个第二孔的下电极和介于上电极和下电极之间的电介质。

公开(公告)号：US20100098429A1

公开(公告)日：2010-04-22

申请号：US12517783

申请日：2007-12-05

申请人： Yong-Il Jun ,  Wangjoo Lee ,  Tae-Joon Park ,  Young-Boo Kim

发明人： Yong-Il Jun ,  Wangjoo Lee ,  Tae-Joon Park ,  Young-Boo Kim

IPC分类号： H04B10/12

CPC分类号： G01J1/0411 ,  G01J1/02 ,  G01J1/0204 ,  G01J1/04 ,  G01J1/46 ,  H01L31/0203 ,  H01L31/02325

摘要： Provided are a multi-aperture optical detector that can address structural problems such as a complex signal wiring in array type optical detectors, and a need for a plurality of low noise amplifiers, signal to noise ratio detectors, etc., and an optical signal detecting circuit including the multi-aperture optical detector. The multi-aperture optical detector includes transmission lines having two output terminals; and a plurality of unit optical detectors which respectively have random polarities through the transmission lines and are connected in parallel, and optical signals from each of the unit optical detectors are added and output through the two output terminals. The multi-aperture optical detector has a high operation band width and can detect optical signals with a high sensitivity by connecting a plurality of unit optical detectors that respectively have a low optical detecting sensitivity and are physically compact and small.

摘要翻译： 提供了一种可以解决诸如阵列式光检测器中的复杂信号布线等结构问题的多孔光学检测器，以及需要多个低噪声放大器，信噪比检测器等，以及光信号检测 电路包括多孔光学检测器。 多孔光学检测器包括具有两个输出端的传输线; 以及分别通过传输线具有并联并联的随机极性的多​​个单元光学检测器，并且来自每个单元光学检测器的光信号通过两个输出端相加并输出。 多孔光学检测器具有高的操作带宽，并且可以通过连接分别具有低光学检测灵敏度并且物理紧凑和小的多个单元光学检测器来检测具有高灵敏度的光信号。