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    • 1. 发明授权
    • Phase error corrector for HDTV reception system
    • 高清电视接收系统的相位误差校正器
    • US5602601A
    • 1997-02-11
    • US426182
    • 1995-04-21
    • Jong G. KimKyeong S. KimSu W. Jung
    • Jong G. KimKyeong S. KimSu W. Jung
    • H04N19/89H04L27/02H04N5/21H04N11/24
    • H04N5/21H04L27/02H04N11/008
    • A phase error corrector for an HDTV reception system, which can correct data level errors by reducing phase errors coming from local oscillators, includes a gain and offset adjustment unit for adjusting a gain and an offset of incoming I data, a Hilbert transform filter for performing a Hilbert transform filtering of the I data received from the gain and offset adjustment unit for generating Q data, a log LUT for producing logarithmic values of the I data and the Q data received from the gain and offset adjustment unit and the Hilbert transform filter into a logI value and a logQ value respectively, a complex multiplexer for generating a corrected I value and a corrected Q value having their errors corrected out of the logI value and the logQ value received from the log LUT, a phase error detector for detecting phase errors from the corrected I value and the corrected Q value received from the complex multiplexer, and a loop filter for accumulating phase errors received from the phase error detector and applying the accumulated phase errors to the complex multiplexer. The phase error detector advantageously can reduce slice errors caused by phase noise coming from the local oscillator used in a tuner by correcting phase errors, and can be applicable not only to an HDTV but also a QAM for correcting phase errors in an 8 VSB system.
    • 用于通过减少来自本地振荡器的相位误差校正数据电平误差的HDTV接收系统的相位误差校正器包括用于调整输入I数据的增益和偏移的增益和偏移调整单元,用于执行的希尔伯特变换滤波器 从用于产生Q数据的增益和偏移调整单元接收的I数据的希尔伯特变换滤波,用于产生从增益和偏移调整单元接收的I数据和Q数据的对数值的对数LUT和希尔伯特变换滤波器 logI值和logQ值,用于产生经校正的I值的复数多路复用器和具有从logI值校正的其误差和从log LUT接收的logQ值的校正Q值,用于检测相位误差的相位误差检测器 从修正的I值和从复数复用器接收到的校正的Q值,以及用于累加从相位接收的相位误差的环路滤波器 误差检测器并将累加的相位误差应用于复合多路复用器。 相位误差检测器有利地可以通过校正相位误差来减少来自调谐器中使用的本地振荡器的相位噪声引起的切片误差,并且不仅可以应用于HDTV,而且可以应用于用于校正8 VSB系统中的相位误差的QAM。
    • 4. 发明授权
    • BICMOS device and manufacturing method thereof
    • BICMOS器件及其制造方法
    • US5192992A
    • 1993-03-09
    • US794739
    • 1991-11-18
    • Myung S. KimJong G. KimHyun S. Kim
    • Myung S. KimJong G. KimHyun S. Kim
    • H01L21/28H01L21/8228H01L21/8234H01L21/8249H01L27/06H01L27/082H01L27/088
    • H01L27/0623H01L21/28061H01L21/8249
    • A BICMOS device and manufacturing method wherein the gates of PMOS and NMOS transistors are formed by forming a first polysilicon layer which is not implanted by an impurity and forming a second polysilicon layer on the first polysilicon layer which is impurity implanted, so that the impurity doped in the second polysilicon layer is prevented from diffusing into the channel region and the voltage characteristic is prevented from changing. Emitter regions of vertical PNP and NPN bipolar transistors are self-aligned in a small chip area, and thereby the performance of the BICMOS device is improved due to the stable threshold voltage characteristic of the PMOS and NMOS transistors and high density is achieved together with improved operation speed clue to the self-alignment formation of the emitter region of the vertical PNP and NPN bipolar transistors.
    • 一种BICMOS器件及其制造方法,其中PMOS和NMOS晶体管的栅极通过形成未被杂质注入的第一多晶硅层并在杂质注入的第一多晶硅层上形成第二多晶硅层形成,使得杂质掺杂 在第二多晶硅层中防止扩散到沟道区,并且防止电压变化。 垂直PNP和NPN双极晶体管的发射极区域在小芯片区域中自对准,从而由于PMOS和NMOS晶体管的稳定的阈值电压特性而提高了BICMOS器件的性能,并且实现了高密度 对垂直PNP和NPN双极晶体管的发射极区域的自对准形成的操作速度线索。