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
    • 5. 发明授权
    • Automatic frequency control circuit
    • 自动频率控制电路
    • US5289506A
    • 1994-02-22
    • US842540
    • 1992-02-27
    • Takamitsu KitayamaMasao MiyazakiTomozo OhtaTakahiro Chihara
    • Takamitsu KitayamaMasao MiyazakiTomozo OhtaTakahiro Chihara
    • H03J7/06H04L27/00H04L27/227H04L27/06
    • H04L27/2273H03J7/065H04L2027/003H04L2027/0073
    • An AFC circuit stabilizes the frequency of an intermediate frequency signal to be applied to a demodulation circuit. A frequency conversion circuit responds to a local oscillation signal generated from a voltage-controlled oscillation circuit to convert the frequency of a digital modulation signal and applies the converted frequency to the demodulation circuit. A carrier reproduction circuit in the demodulation circuit reproduces the carrier of the intermediate frequency signal to output a synchronizing detection signal. The frequency of the reproduced carrier is frequency-divided by a frequency dividing circuit. A frequency division output thereof is counted by a counter for a definite period. Data is outputted from a microprocessor in response to a count output of the counter and the synchronizing detection signal, and the data is then converted into an AFC voltage by a D/A converter. The converted voltage is supplied as a control voltage to the voltage-controlled oscillation circuit. A stable intermediate frequency signal can be obtained by frequency-dividing the frequency of the carrier and counting the frequency division output thereof.
    • AFC电路使要施加到解调电路的中频信号的频率稳定。 频率转换电路响应于从压控振荡电路产生的本地振荡信号,以转换数字调制信号的频率,并将转换的频率应用于解调电路。 解调电路中的载波再现电路再现中频信号的载波以输出同步检测信号。 再现载波的频率由分频电路分频。 其分频输出由计数器计数一定时间。 响应于计数器的计数输出和同步检测信号,从微处理器输出数据,然后通过D / A转换器将数据转换成AFC电压。 将转换的电压作为控制电压提供给压控振荡电路。 可以通过对载波的频率进行分频并对其分频输出进行计数来获得稳定的中频信号。
    • 8. 发明授权
    • Dual-mode cellular telephone system
    • 双模蜂窝电话系统
    • US6035213A
    • 2000-03-07
    • US868993
    • 1997-06-04
    • Masamori TokudaMasao MiyazakiTakeshi Okamoto
    • Masamori TokudaMasao MiyazakiTakeshi Okamoto
    • H04J13/00H04B1/10H04Q7/32H04B1/38
    • H04B1/71H04B1/1036H04B1/7101H04B1/7102H04B2001/1063
    • A dual-mode cellular telephone system which is capable of suppressing a narrow-band disturbing signal appearing in a mobile station of a dual-mode cellular telephone system adapted for both an analog system and a digital CDMA system. A CDMA signal from a CDMA base station, and a narrow-band signal from an analog system are received through an antenna by a receiver, whereby they are amplified, subjected to frequency conversion, and input to a variable notch filter. A disturbing signal detection circuit supplies the variable notch filter with a control signal for varying its frequency. Namely, the disturbing signal detection circuit detects a case that an output level of the variable notch filter is at a minimum by changing the notch frequency via a series of sweeping control signals. A control signal at which the output level of the variable notch filter is at a minimum is then fed to the variable notch filter, thereby effectively suppressing any intermodulation distortions present in the mobile station.
    • 一种双模式蜂窝电话系统,其能够抑制适用于模拟系统和数字CDMA系统的双模蜂窝电话系统的移动台中出现的窄带干扰信号。 来自CDMA基站的CDMA信号和来自模拟系统的窄带信号由接收机通过天线接收,由此被放大,进行频率转换并输入到可变陷波滤波器。 干扰信号检测电路为可变陷波滤波器提供用于改变其频率的控制信号。 也就是说,干扰信号检测电路通过一系列扫频控制信号来改变陷波频率来检测可变陷波滤波器的输出电平最小的情况。 可变陷波滤波器的输出电平处于最小的控制信号然后被馈送到可变陷波滤波器,从而有效地抑制移动台中存在的任何互调失真。
    • 10. 发明授权
    • Cable stayed suspension bridge making combined use of one-box and two-box girders
    • 电缆悬吊桥梁组合使用单箱和双箱梁
    • US07743444B2
    • 2010-06-29
    • US11570317
    • 2004-06-09
    • Jun MurakoshiKoichiro FumotoHideki ShimodoiMasao MiyazakiSyuji ShiraiMasato Suzawa
    • Jun MurakoshiKoichiro FumotoHideki ShimodoiMasao MiyazakiSyuji ShiraiMasato Suzawa
    • E01D11/00
    • E01D11/00
    • A cable-stayed suspension bridge having characteristics of a cable stayed bridge and those of a suspension bridge at the same and time and using one-box and two-box girders in combination is disclosed. The bridge grinder of the cable-stayed suspension bridge includes one-box girders that each extend to both sides through the respective one tower and a two-box girder set in a central portion of the center span between towers in the length direction of the bridge girder. The cable-stayed suspension bridge includes cable-stayed structures in which a respective one of the one-box girders is supported by the tower with plural cables and a suspension structure in which the two-box girder is supported by the plural towers with two main cables and plural hanger ropes. The two-box girder has a central ventilation opening in the central portion as viewed in a transverse direction thereof. The hanger ropes in the suspension structure extend from the main cables almost perpendicularly, and their lower end portions are connected to the end portions in the transverse direction of the central ventilation opening or in the vicinity thereof.
    • 公开了一种具有斜拉桥特性的斜拉桥,并且悬挂桥的特征在同一时间,并结合使用单箱和双箱梁。 斜拉桥的桥式研磨机包括单箱梁,其各自通过相应的一个塔架延伸到两侧,并且在桥梁的长度方向上的塔架之间的中心跨度的中心部分设置两个箱梁 梁。 缆索式悬索桥包括斜拉索结构,其中单个箱梁中的相应一个由具有多个电缆的塔架和悬架结构支撑,其中双箱梁由具有两个主体的多个塔架支撑 电缆和多个吊架绳索。 双箱梁在其横向方向上具有在中心部分中的中央通风开口。 悬挂结构中的衣架绳从主电缆几乎垂直地延伸,并且它们的下端部在中央通风口的横向或其附近与端部连接。