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    • 22. 发明申请
    • RECEIVER AND SEMICONDUCTOR INTEGRATED DEVICE
    • 接收器和半导体集成器件
    • US20080295134A1
    • 2008-11-27
    • US12123798
    • 2008-05-20
    • Noboru TagaTakashi Seki
    • Noboru TagaTakashi Seki
    • G06F13/10
    • H04N5/52H04H20/59H04H40/27H04N5/4401H04N5/46H04N21/4263H04N21/4382H04N21/6112H04N21/6143
    • A receiver includes: first and second tuners configured to select respectively different broadcast channels; first and second AGC control circuits configured to generate first and second AGC control signals configured to respectively control gains of first and second AGC amplifiers based on output signals of the respective tuners; first and second predetermined voltage generating circuits configured to generate first and second predetermined voltages configured to respectively suppress AGC gains of the first and second AGC amplifiers; and a control section configured to control to selectively apply the first AGC control signal and the first predetermined voltage to the first AGC amplifier, and control to selectively apply the second AGC control signal and the second predetermined voltage to the second AGC amplifier.
    • 接收机包括:第一和第二调谐器,被配置为分别选择不同的广播信道; 第一和第二AGC控制电路,被配置为产生第一和第二AGC控制信号,其被配置为基于各个调谐器的输出信号分别控制第一和第二AGC放大器的增益; 第一和第二预定电压发生电路,被配置为产生被配置为分别抑制第一和第二AGC放大器的AGC增益的第一和第二预定电压; 以及控制部,被配置为控制以选择性地将第一AGC控制信号和第一预定电压施加到第一AGC放大器,并且控制以选择性地将第二AGC控制信号和第二预定电压施加到第二AGC放大器。
    • 23. 发明授权
    • OFDM receiving apparatus and method of demodulation in OFDM receiving apparatus
    • OFDM接收装置和OFDM接收装置中的解调方法
    • US07206279B2
    • 2007-04-17
    • US10389951
    • 2003-03-18
    • Noboru TagaTakashi Seki
    • Noboru TagaTakashi Seki
    • H04J11/00
    • H04L27/2647
    • An apparatus for receiving an OFDM modulated signal includes: an A/D converter converting the received signal to a digital signal; a quadrature demodulator performing quadrature detection of the digital signal and converting the digital signal to a base-band signal; an FFT circuit transforming the base-band signal to a signal of a frequency domain by performing a fast Fourier transformation; an equalizer equalizing the signal of the frequency domain and obtaining demodulated data; an error correcting circuit performing error correction and decoding the demodulated data obtained by the equalizer; an interference detector detecting a receiving quality for each predetermined frequency band from the demodulated data; and a synchronous sequencer assigning weights to the base-band signal and the signal of the frequency domain based on the receiving quality data, and reproducing a timing synchronized signal and a clock pulse required for the demodulation.
    • 一种用于接收OFDM调制信号的装置,包括:A / D转换器,将接收信号转换成数字信号; 正交解调器,对所述数字信号进行正交检波,并将所述数字信号转换成基带信号; 通过执行快速傅里叶变换将基带信号变换为频域的信号的FFT电路; 均衡器,对频域的信号进行均衡并获得解调数据; 误差校正电路,对由所述均衡器获得的解调数据进行纠错和解码; 干扰检测器,从解调数据检测每个预定频带的接收质量; 以及基于接收质量数据向基带信号和频域的信号分配权重的同步定序器,以及再现定时同步信号和解调所需的时钟脉冲。
    • 24. 发明申请
    • Receiving apparatus
    • 接收装置
    • US20070025473A1
    • 2007-02-01
    • US11492777
    • 2006-07-26
    • Masami AizawaTakashi Seki
    • Masami AizawaTakashi Seki
    • H04L27/00H04K1/10
    • H04L27/2601H03M13/132H03M13/27H03M13/2906H03M13/2936H03M13/356H03M13/3707H04L1/0023H04L1/0045H04L1/0065H04L1/0072H04L27/265
    • A demodulating circuit demodulates a digital broadcasting signal and transmission control information for identifying a transmission system of the digital broadcasting signal from a transmission signal. A buffer circuit holds the transmission control information for at least one frame period. A multi circuit periodically multiplexes the transmission control information demodulated by the demodulating circuit and the transmission control information held by the buffer circuit at least in units of one frame. The multiplexed transmission control information is supplied to the buffer circuit and is also supplied to a first error correction circuit. The first error correction circuit corrects errors of the transmission control information. The transmission control information is multiplexed, and accuracy of error correction is improved by a time interleaving effect so that lead-in time is reduced.
    • 解调电路从发送信号解调用于识别数字广播信号的发送系统的数字广播信号和发送控制信息。 缓冲电路保持传输控制信息至少一个帧周期。 多电路至少以一帧为单位周期性地复用由解调电路解调的传输控制信息和由缓冲电路保持的传输控制信息。 复用的发送控制信息被提供给缓冲电路,并且还被提供给第一纠错电路。 第一纠错电路校正发送控制信息的错误。 传输控制信息被多路复用,并且通过时间交织效应提高了纠错的精度,从而减少了导入时间。
    • 28. 发明授权
    • Disk player
    • 磁盘播放器
    • US5506830A
    • 1996-04-09
    • US106129
    • 1993-08-12
    • Seiichiroh OhishiAkio YamakawaTakashi SekiTetsuhiro Shiomi
    • Seiichiroh OhishiAkio YamakawaTakashi SekiTetsuhiro Shiomi
    • G11B7/085G11B17/04G11B21/02G11B17/30
    • G11B17/056G11B7/08594
    • A disk player has a guide member for guiding an optical pickup carrier along both sides of a double-sided disk. In order to prevent interference between the pickup carrier and the periphery of the disk during turning movement of the pickup carrier around the periphery of the disk from one of the upper and lower sides of the disk to the other side, the guide member is shaped like a horseshoe. The guide member includes upper and lower straight sections for guiding the pickup carrier, respectively, along the upper and lower sides of the disc, and an arched section extending vertically around the periphery of the disk and connecting the outer ends of the upper and lower straight sections. The upper and lower straight sections are not parallel to each other, but rather they are inclined in such a fanlike manner that the outer ends are wider apart.
    • 磁盘播放器具有用于沿着双面盘的两侧引导光学拾取器载体的引导构件。 为了防止在将拾取器载体围绕盘的周边从盘的上侧和下侧之一转移到另一侧的转动载体周围移动期间的拾取器载体和盘周边之间的干扰,引导构件形状如 马蹄铁 引导构件包括用于分别沿着盘的上侧和下侧引导拾取器载体的上部和下部直段,以及围绕盘的周边垂直延伸并且连接上部和下部直线的外端的弓形部分 部分。 上部和下部直线段彼此不平行,而是以这样一种扇形的方式倾斜,使得外端分开较宽。