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1. 发明授权

US07233551B2 Optical disk control device for time-division-multiplexing and A/D conversion 有权
标题翻译：用于时分复用和A / D转换的光盘控制装置
公开(公告)号：US07233551B2
公开(公告)日：2007-06-19
申请号：US10025998
申请日：2001-12-26
申请人： Masayoshi Abe , Kouju Konno , Teruhiko Izumi , Yasuhiro Tai
发明人： Masayoshi Abe , Kouju Konno , Teruhiko Izumi , Yasuhiro Tai
IPC分类号： G11B7/04
CPC分类号： G11B7/005 , G11B7/09 , G11B20/02 , G11B20/10
摘要： An optical disk control device comprises a playback signal detection unit for detecting data recorded on a disk by irradiating the disk with a converged light beam; a signal switching unit for successively selecting plural data signals obtained by the playback signal detection unit, and performing time-division-multiplexing on the selected signals; an A/D conversion unit for converting an analog signal which has been time-division-multiplexed by the signal switching unit, into a digital signal; an A/D conversion command unit for generating an A/D conversion command of the A/D conversion unit; a serial transfer unit for serial-transferring the command signal generated by the A/D conversion command unit; a serial reception unit for receiving the signal from the serial transfer unit, and controlling the signal selection operation of the signal switching unit on the basis of the received signal; and an arithmetic unit for generating an optical disk drive controlling signal by performing arithmetic processing on the digital signal outputted from the A/D control unit. Therefore, the number of signal lines required for connection between the playback signal detection unit and the A/D conversion unit can be significantly reduced.
摘要翻译：光盘控制装置包括：重放信号检测单元，用于通过用会聚的光束照射盘来检测记录在盘上的数据; 信号切换单元，用于连续选择由重放信号检测单元获得的多个数据信号，并对所选择的信号执行时分复用; A / D转换单元，用于将由信号切换单元进行时分复用的模拟信号转换成数字信号; A / D转换指令单元，用于产生A / D转换单元的A / D转换命令; 串行传送单元，用于串行传送由A / D转换命令单元产生的命令信号; 串行接收单元，用于从串行传送单元接收信号，并且基于接收信号控制信号切换单元的信号选择操作; 以及运算单元，用于通过对从A / D控制单元输出的数字信号进行算术处理来产生光盘驱动控制信号。因此，可以显着地减少重放信号检测单元和A / D转换单元之间连接所需的信号线的数量。

2. 发明申请

US20060126473A1 Dropout detection circuit and optical disc apparatus 失效
公开(公告)号：US20060126473A1
公开(公告)日：2006-06-15
申请号：US11349884
申请日：2006-02-09
申请人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
发明人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
IPC分类号： G11B27/36 , G11B20/18 , G11B11/105 , G11B11/03 , G11B11/11 , G11B11/115 , G11B11/12 , G11B7/00
CPC分类号： G11B7/00375 , G11B7/0948 , G11B20/10009
摘要： The dropout detection circuit of the invention includes: a high-speed envelope detection circuit for detecting an envelope of a reflection signal of a light beam with a first time constant; a low-speed envelope detection circuit for detecting an envelope of the reflection signal with a second time constant larger than the first time constant; a differential circuit for generating a difference signal indicating the difference between the envelopes detected by the envelope detection circuits; and a comparator for converting the difference signal to a binary value according to a predetermined binary criterion. The high-speed envelope detection circuit makes the first time constant larger during recording than during reproduction, to enable stable dropout detection irrespective of during reproduction or during recording.

3. 发明授权

US07567488B2 Dropout detection circuit and optical disc apparatus 失效
标题翻译：压差检测电路和光盘装置
公开(公告)号：US07567488B2
公开(公告)日：2009-07-28
申请号：US11349884
申请日：2006-02-09
申请人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
发明人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
IPC分类号： G11B15/52
CPC分类号： G11B7/00375 , G11B7/0948 , G11B20/10009
摘要： The dropout detection circuit of the invention includes: a high-speed envelope detection circuit for detecting an envelope of a reflection signal of a light beam with a first time constant; a low-speed envelope detection circuit for detecting an envelope of the reflection signal with a second time constant larger than the first time constant; a differential circuit for generating a difference signal indicating the difference between the envelopes detected by the envelope detection circuits; and a comparator for converting the difference signal to a binary value according to a predetermined binary criterion. The high-speed envelope detection circuit makes the first time constant larger during recording than during reproduction, to enable stable dropout detection irrespective of during reproduction or during recording.
摘要翻译：本发明的压差检测电路包括：高速包络检测电路，用于以第一时间常数检测光束的反射信号的包络; 低速包络检测电路，用于以大于第一时间常数的第二时间常数检测反射信号的包络; 差分电路，用于产生指示由包络检测电路检测的信封之间的差异的差分信号; 以及比较器，用于根据预定的二进制标准将差信号转换为二进制值。高速包络检测电路在记录期间比在再现期间第一次恒定更大，以使得能够在再现期间或在记录期间进行稳定的压差检测。

4. 发明授权

US07023782B2 Dropout detection circuit and optical disc apparatus 失效
公开(公告)号：US07023782B2
公开(公告)日：2006-04-04
申请号：US10247328
申请日：2002-09-20
申请人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
发明人： Masayoshi Abe , Teruhiko Izumi , Katsumi Morita
IPC分类号： G11B7/00
CPC分类号： G11B7/00375 , G11B7/0948 , G11B20/10009
摘要： The dropout detection circuit of the invention includes: a high-speed envelope detection circuit for detecting an envelope of a reflection signal of a light beam with a first time constant; a low-speed envelope detection circuit for detecting an envelope of the reflection signal with a second time constant larger than the first time constant; a differential circuit for generating a difference signal indicating the difference between the envelopes detected by the envelope detection circuits; and a comparator for converting the difference signal to a binary value according to a predetermined binary criterion. The high-speed envelope detection circuit makes the first time constant larger during recording than during reproduction, to enable stable dropout detection irrespective of during reproduction or during recording.

5. 发明授权

US5155716A Servo system for optical recording/reproducing drive 失效
标题翻译：伺服系统，用于光记录/再生驱动
公开(公告)号：US5155716A
公开(公告)日：1992-10-13
申请号：US703639
申请日：1991-05-21
申请人： Ryoichi Imanaka , Masayoshi Abe , Yasuhiro Tai
发明人： Ryoichi Imanaka , Masayoshi Abe , Yasuhiro Tai
IPC分类号： G11B7/085 , G11B7/09
CPC分类号： G11B7/0943
摘要： A digital servo system for use in an optical recording/reproducing apparatus equipped with an optical system for illuminating an optical recording medium with a light beam to record and reproduce an information signal on and from the optical recording medium, the servo system being for more accurately performing a tracking and focusing control of the light beam with respect to the optical recording medium. The servo system is provided with a plurality of photodetectors to obtain a servo error signal which is in turn supplied to an attenuator and then supplied to an analog-to-digital converter to be digitized so as to constitute a digital filter. The servo system is arranged so as to set the attenuation factor of the attenuator so that the input signal of the analog-to-digital converter is kept in a predetermined range. This permits the tracking and focusing control with a high precision and further allows an AGC amplifier having a high-speed automatic gain-controllable function to be arranged to be digitally controllable.

6. 发明授权

US07974363B2 Receiver, receiving method, filter circuit, and control method 有权
标题翻译：接收机，接收方式，滤波电路及控制方法
公开(公告)号：US07974363B2
公开(公告)日：2011-07-05
申请号：US11869965
申请日：2007-10-10
申请人： Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
发明人： Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
IPC分类号： H03K9/00 , H04L27/00 , H03M1/12 , H03M3/00 , H03M1/66
CPC分类号： H04B1/0021 , H04B1/28
摘要： A receiver supporting a plurality of radio communication systems having different specifications includes a setting unit, a clock generation circuit, a voltage-current conversion amplifier, a switch, integrators, an AD conversion circuit, and a feedback circuit. The setting unit sets a value suitable for a carrier frequency used in one selected radio communication system. The clock generation circuit generates a first clock having a first frequency and a second clock having a second frequency. The conversion amplifier converts an input voltage signal into a current signal. The switch switches between connection and disconnection modes in accordance with the first clock to output the current signal. Each integrator operates in accordance with the second clock and includes two or more switched capacitor circuits and an operational amplifier. The AD conversion circuit converts a signal supplied from the preceding integrator into digital form. The feedback circuit operates in accordance with the second clock.
摘要翻译：支持具有不同规格的多个无线电通信系统的接收机包括设置单元，时钟发生电路，电压 - 电流转换放大器，开关，积分器，AD转换电路和反馈电路。设置单元设置适合于一个所选无线电通信系统中使用的载波频率的值。时钟产生电路产生具有第一频率的第一时钟和具有第二频率的第二时钟。转换放大器将输入电压信号转换为电流信号。该开关根据第一个时钟在连接和断开模式之间切换以输出当前信号。每个积分器根据第二时钟进行操作，并且包括两个或更多个开关电容器电路和运算放大器。 AD转换电路将从前一积分器提供的信号转换为数字形式。反馈电路根据第二时钟进行工作。

7. 发明授权

US07957476B2 Wireless communicaton apparatus 有权
标题翻译：无线通信设备
公开(公告)号：US07957476B2
公开(公告)日：2011-06-07
申请号：US11747676
申请日：2007-05-11
申请人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
发明人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2663 , H04L27/2675
摘要： A wireless communication apparatus for receiving a packet formed of a signal modulated by OFDM includes the following elements. A band-pass filter extracts an OFDM signal of a desired band. A low-noise amplifier having a gain controlled according to a received-signal intensity amplifies the desired OFDM signal. A frequency converter down-converts the amplified OFDM signal into a baseband signal. An analog-digital converter converts the baseband signal into a digital signal. A first high-pass filter removes a DC offset from the baseband signal corresponding to a predetermined preamble portion of the packet. A frequency-offset estimator estimates a frequency offset from the sample signals constituting the baseband signal from which the DC offset has been removed by the first high-pass filter. A frequency-offset corrector removes the estimated frequency offset from the baseband signal. A demodulator demodulates subcarrier signals arranged in a frequency domain from the baseband signal compensated for the frequency offset.
摘要翻译：用于接收由OFDM调制的信号形成的分组的无线通信装置包括以下要素。带通滤波器提取期望频带的OFDM信号。具有根据接收信号强度控制的增益的低噪声放大器放大所需的OFDM信号。变频器将放大的OFDM信号下变频为基带信号。模拟数字转换器将基带信号转换为数字信号。第一高通滤波器从对应于分组的预定前同步码部分的基带信号中去除DC偏移。频率偏移估计器估计构成通过第一高通滤波器去除了DC偏移的基带信号的采样信号的频率偏移。频偏校正器去除基带信号的估计频偏。解调器解调从频率补偿的基带信号中排列在频域中的副载波信号。

8. 发明申请

US20080256157A1 Information Processing Device and Information Processing Method 有权
标题翻译：信息处理设备和信息处理方法
公开(公告)号：US20080256157A1
公开(公告)日：2008-10-16
申请号：US11946437
申请日：2007-11-28
申请人： Anas bin Muhamad BOSTAMAN , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
发明人： Anas bin Muhamad BOSTAMAN , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
IPC分类号： G06F17/10
CPC分类号： H03H17/0621 , H03H17/0685
摘要： An information processing device for processing reception signals converted into digital signals, includes: a first conversion unit for executing sampling rate conversion of each of the digital signals to be computed with each tap coefficient of a K'th-order FIR filter; a filter computing unit for executing computation processing of the K'th order FIR filter on K digital signals each of which have been subjected to sampling rate conversion by the first conversion unit; and a control unit for controlling sampling rate conversion of the digital signals by the first conversion unit, and the computation processing of the K'th order FIR filter by the filter computing unit.
摘要翻译：一种用于处理被转换为数字信号的接收信号的信息处理装置，包括：第一转换单元，用于对第K级FIR滤波器的每个抽头系数执行的每个待计算的数字信号的采样率转换; 滤波器计算单元，用于对已经由第一转换单元进行了采样率转换的K个数字信号执行第K级FIR滤波器的计算处理; 以及控制单元，用于通过第一转换单元控制数字信号的采样率转换，以及由滤波器计算单元计算第K级FIR滤波器的计算处理。

9. 发明申请

US20080089443A1 WIRELESS COMMUNICATON APPARATUS 有权
标题翻译：无线通信设备
公开(公告)号：US20080089443A1
公开(公告)日：2008-04-17
申请号：US11747676
申请日：2007-05-11
申请人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
发明人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
IPC分类号： H04J11/00
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2663 , H04L27/2675
摘要： A wireless communication apparatus for receiving a packet formed of a signal modulated by OFDM includes the following elements. A band-pass filter extracts an OFDM signal of a desired band. A low-noise amplifier having a gain controlled according to a received-signal intensity amplifies the desired OFDM signal. A frequency converter down-converts the amplified OFDM signal into a baseband signal. An analog-digital converter converts the baseband signal into a digital signal. A first high-pass filter removes a DC offset from the baseband signal corresponding to a predetermined preamble portion of the packet. A frequency-offset estimator estimates a frequency offset from the sample signals constituting the baseband signal from which the DC offset has been removed by the first high-pass filter. A frequency-offset corrector removes the estimated frequency offset from the baseband signal. A demodulator demodulates subcarrier signals arranged in a frequency domain from the baseband signal compensated for the frequency offset.
摘要翻译：用于接收由OFDM调制的信号形成的分组的无线通信装置包括以下要素。带通滤波器提取期望频带的OFDM信号。具有根据接收信号强度控制的增益的低噪声放大器放大所需的OFDM信号。变频器将放大的OFDM信号下变频为基带信号。模拟数字转换器将基带信号转换为数字信号。第一高通滤波器从对应于分组的预定前同步码部分的基带信号中去除DC偏移。频率偏移估计器估计构成通过第一高通滤波器去除了DC偏移的基带信号的采样信号的频率偏移。频偏校正器去除基带信号的估计频偏。解调器解调从频率补偿的基带信号中排列在频域中的副载波信号。

10. 发明授权

US06999528B2 I/Q demodulator device with three power detectors and two A/D converters 失效
标题翻译： I / Q解调器具有三个功率检测器和两个A / D转换器
公开(公告)号：US06999528B2
公开(公告)日：2006-02-14
申请号：US09947145
申请日：2001-09-05
申请人： Veselin Brankovic , Dragan Krupezevic , Mohamed Ratni , Masayoshi Abe , Noboru Sasho
发明人： Veselin Brankovic , Dragan Krupezevic , Mohamed Ratni , Masayoshi Abe , Noboru Sasho
IPC分类号： H03D3/22 , H04L27/22
CPC分类号： H03D1/2245 , H03D3/007 , H03D9/04 , H04B1/30
摘要： The present invention relates to a method and a device for the I/Q demodulation of modulated RF signals. The I/Q demodulator (60) has a first input for the RF signal (61) to be demodulated and a second input for a RF signal (62) originating from a local oscillator (20). The demodulator (60) combines the two RF signals (61,62) to generate three output signals supplied to three power detectors. In a combination unit (70) the three power signals of the power detectors are merged in two signal branches wherein after passing an A/D converting (72) and digital processing unit (73) one signal is the I component and the other one is the Q component of the received modulated RF signal (61).
摘要翻译：本发明涉及用于调制RF信号的I / Q解调的方法和装置。 I / Q解调器（60）具有要被解调的RF信号（61）的第一输入和源自本地振荡器（20）的RF信号（62）的第二输入。解调器（60）组合两个RF信号（61,62）以产生提供给三个功率检测器的三个输出信号。在组合单元（70）中，功率检测器的三个功率信号被合并在两个信号分支中，其中在通过A / D转换（72）和数字处理单元（73）之后，一个信号是I分量，另一个是所接收的调制RF信号（61）的Q分量。

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