会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明专利
    • Radio chronometer calibrating device
    • 无线电测速计校准装置
    • JP2012068090A
    • 2012-04-05
    • JP2010212112
    • 2010-09-22
    • Isao Okada功 岡田
    • OKADA ISAO
    • G04G5/00G04G99/00G04R20/08G04R20/26
    • PROBLEM TO BE SOLVED: To solve the problem with radio chronometers, which undergo calibration of time indication with reference to a standard radio wave, that the standard wave is difficult to receive in buildings, basements and steel-framed ferroconcrete condominiums on account of the insufficient field strength of the wave and that, if calibration with reference to the standard radio wave is unsuccessful, such a chronometer will operate as a quartz chronometer but only with errors of about 15 seconds per month, such errors accumulating over time to make accurate time indication impossible.SOLUTION: In each of transmitters 110 and 100 for radio chronometers, a single-chip microcomputer 11 in the transmitter acquires date and time-of-the-day data based on chronometer data in a PC 200 calibrated according to Internet time information and initializes a microcomputer chronometer in the single-chip microcomputer; and on the basis of the initialized microcomputer chronometer, a digital-to-analog converter (DAC) 12 modulates the JJY standard radio wave and emits from a band pass filter 13 and a power amplifier 14 or from a short antenna 15 a weak radio wave in conformity with the standard radio wave.
    • 要解决的问题:为了解决无线电计时器的问题,无线电计时器参照标准无线电波进行时间指示校准,标准波在建筑物,地下室和钢框架钢筋混凝土公寓中难以接收 的波强不足,如果参考标准无线电波的校准不成功,这样的计时器将作为石英计时器运行,但每月只有大约15秒的误差,这些误差随时间累积, 准确的时间指示是不可能的。 解决方案:在用于无线电计时器的每个发射机110和100中,发射机中的单片机11基于根据因特网时间信息校准的PC 200中的计时器数据来获取日期和时间数据 并在单片机中初始化微电脑计时器; 并且基于初始化的微计算机计时器,数模转换器(DAC)12调制JJY标准无线电波,并从带通滤波器13和功率放大器14或从短天线15发射弱无线电波 符合标准无线电波。 版权所有(C)2012,JPO&INPIT
    • 9. 发明授权
    • Demodulation circuit, a decode circuit and a digital PLL circuit for an optical disc apparatus
    • 解调电路,解码电路和用于光盘装置的数字PLL电路
    • US06359949B1
    • 2002-03-19
    • US09620054
    • 2000-07-20
    • Isao OkadaTsuyoshi Hirabuki
    • Isao OkadaTsuyoshi Hirabuki
    • H04L2300
    • G11B27/24G11B20/10009G11B20/1419G11B20/18G11B27/3027G11B2220/218G11B2220/2545H03M5/12
    • An optical disc apparatus has a demodulation circuit performing an FSK demodulation by being provided with a binary signal which is obtained by binarizing a signal reproduced from an optical disc on which an FSK modulation signal is previously recorded. An edge interval of the binary signal is measured. An FSK modulation component is obtained from a difference between a measured edge interval value and a previously determined edge interval reference value. A demodulation value is obtained based on a moving average of the FSK modulation component. A moving average of the demodulation value is compared with a reference value so as to obtain a binary FSK demodulation signal. Additionally, the optical disc apparatus includes a decode circuit for decoding binary data from a biphase code signal which is reproduced from an optical disc and to be inverted at an end of each bit. When an inversion of the biphase code signal is not performed at an end of a bit, the decode circuit corrects the binary data immediately before or after the end of the bit. Further, the optical disc apparatus includes a digital PLL circuit which divides a frequency of a demodulated signal reproduced from the optical disc by a predetermined dividing ratio. A clock signal is obtained based on an edge interval value of the divided modulated signal.
    • 光盘装置具有通过提供二进制信号来执行FSK解调的解调电路,二进制信号是通过二值化从先前记录有FSK调制信号的光盘再现的信号而获得的。 测量二进制信号的边沿间隔。 从测量的边缘间隔值和预先确定的边缘间隔参考值之间的差获得FSK调制分量。 基于FSK调制分量的移动平均值获得解调值。 将解调值的移动平均值与参考值进行比较,以获得二进制FSK解调信号。 此外,光盘装置包括一个解码电路,用于从一个从光盘再现的双相码信号中解码二进制数据,并在每个位的末尾被反相。 当在比特结束时不执行双相码信号的反转时,解码电路在比特结束之前或之后立即校正二进制数据。 此外,光盘装置包括数字PLL电路,其将从光盘再现的解调信号的频率除以预定的分频比。 基于分频调制信号的边沿间隔值获得时钟信号。
    • 10. 发明授权
    • Demodulation circuit, a decode circuit and a digital PLL circuit for an optical disc apparatus
    • 解调电路,解码电路和用于光盘装置的数字PLL电路
    • US06175542B1
    • 2001-01-16
    • US09084359
    • 1998-05-22
    • Isao OkadaTsuyoshi Hirabuki
    • Isao OkadaTsuyoshi Hirabuki
    • G11B7005
    • G11B27/24G11B20/10009G11B20/1419G11B20/18G11B27/3027G11B2220/218G11B2220/2545H03M5/12
    • An optical disc apparatus has a demodulation circuit performing an FSK demodulation by being provided with a binary signal which is obtained by binarizing a signal reproduced from an optical disc on which an FSK modulation signal is previously recorded. An edge interval of the binary signal is measured. An FSK modulation component is obtained from a difference between a measured edge interval value and a previously determined edge interval reference value. A demodulation value is obtained based on a moving average of the FSK modulation component. A moving average of the demodulation value is compared with a reference value so as to obtain a binary FSK demodulation signal. Additionally, the optical disc apparatus includes a decode circuit for decoding binary data from a biphase code signal which is reproduced from an optical disc and to be inverted at an end of each bit. When an inversion of the biphase code signal is not performed at an end of a bit, the decode circuit corrects the binary data immediately before or after the end of the bit. Further, the optical disc apparatus includes a digital PLL circuit which divides a frequency of a demodulated signal reproduced from the optical disc by a predetermined dividing ratio. A clock signal is obtained based on an edge interval value of the divided modulated signal.
    • 光盘装置具有通过提供二进制信号来执行FSK解调的解调电路,二进制信号是通过二值化从先前记录有FSK调制信号的光盘再现的信号而获得的。 测量二进制信号的边沿间隔。 从测量的边缘间隔值和预先确定的边缘间隔参考值之间的差获得FSK调制分量。 基于FSK调制分量的移动平均值获得解调值。 将解调值的移动平均值与参考值进行比较,以获得二进制FSK解调信号。 此外,光盘装置包括一个解码电路,用于从一个从光盘再现的双相码信号中解码二进制数据,并在每个位的末尾被反相。 当在比特结束时不执行双相码信号的反转时,解码电路在比特结束之前或之后立即校正二进制数据。 此外,光盘装置包括数字PLL电路,其将从光盘再现的解调信号的频率除以预定的分频比。 基于分频调制信号的边沿间隔值获得时钟信号。