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    • 4. 发明授权
    • Data delay circuit and clock extraction circuit using the same
    • 数据延迟电路和时钟提取电路使用相同
    • US5066877A
    • 1991-11-19
    • US662502
    • 1991-02-28
    • Hiroshi HamanoIzumi AmemiyaTakuji YamamotoYasunari AraiTakeshi Ihara
    • Hiroshi HamanoIzumi AmemiyaTakuji YamamotoYasunari AraiTakeshi Ihara
    • H03K5/00H03K5/13
    • H03K5/13H03K5/133H03K2005/00156H03K2005/00176H03K2005/00182
    • A data delay circuit includes a first transistor, and a second transistor having a base, an emitter and a collector. Input data is applied to the bases of the first and second transistors. A constant-current source is coupled between the emitters of the first and second transistors and a negative power source. A capacitor is connected between the collector of the first transistor and the collector of the second transistor. The data delay circuit further includes a third transistor and a fourth transistor. The emitters of the third and fourth transistors are connected to the collectors of the first and second transistors, respectively. The bases of the third and fourth transistors are provided with control data having a polarity opposite to that of the input data and having an adjusted amplitude level corresponding to a desired delay time to be given the input data. First and second load resistors are respectively coupled to the collectors of the third and fourth transistors through a positive power source. Delayed input data is drawn from the collectors of the third and fourth transistors.
    • 数据延迟电路包括第一晶体管和具有基极,发射极和集电极的第二晶体管。 输入数据被施加到第一和第二晶体管的基极。 恒流源耦合在第一和第二晶体管的发射极和负电源之间。 电容器连接在第一晶体管的集电极和第二晶体管的集电极之间。 数据延迟电路还包括第三晶体管和第四晶体管。 第三和第四晶体管的发射极分别连接到第一和第二晶体管的集电极。 第三和第四晶体管的基极设置有与输入数据的极性相反的极性的控制数据,并且具有对应于要给予输入数据的所需延迟时间的调整幅度电平。 第一和第二负载电阻器通过正电源分别耦合到第三和第四晶体管的集电极。 来自第三和第四晶体管的集电极的延迟输入数据。
    • 9. 发明授权
    • Optical receiving apparatus and method
    • 光接收装置及方法
    • US06498670B2
    • 2002-12-24
    • US09119595
    • 1998-07-21
    • Katsuya YamashitaTakeshi IharaHiroshi Hamano
    • Katsuya YamashitaTakeshi IharaHiroshi Hamano
    • H04B1006
    • H04B10/6932H04L7/033
    • It is aimed at providing an optical receiving apparatus and an optical receiving method, which can assuredly receive and process signal lights having different transmission rates, by a simple and single device. To this end, the signal light received by the present optical receiving apparatus is converted into an electric signal by a light receiving element and thereafter sent to an equalizing amplifier whereby the signal is amplified. The transmission rate of this received signal is detected by a transmission rate detecting part, and a band of the equalizing amplifier is optimally controlled by an equalizing band controlling part, corresponding to the detected transmission rate. In case of adopting a PLL (phase-locked loop) circuit as a clock generating circuit, there is also controlled a band of a loop filter corresponding to the transmission rate detected by the transmission rate detecting part. Thus, there can be obtained an excellent reception characteristics, even when receiving signal lights having different transmission rates.
    • 旨在提供一种光接收装置和光接收方法,其可以通过简单且单一的装置可靠地接收和处理具有不同传输速率的信号灯。 为此,由光接收装置接收的信号光被光接收元件转换成电信号,然后发送到均衡放大器,由此信号被放大。 该接收信号的传输速率由传输速率检测部分检测,并且均衡放大器的频带被对应于检测到的传输速率的均衡频带控制部分最佳地控制。 在采用PLL(锁相环)电路作为时钟发生电路的情况下,还控制与由传输速率检测部分检测到的传输速率相对应的环路滤波器的频带。 因此,即使接收到具有不同传输速率的信号灯,也可以获得良好的接收特性。
    • 10. 发明授权
    • Equalizing filter and control method for signal equalization
    • 均衡滤波器和信号均衡控制方法
    • US5963110A
    • 1999-10-05
    • US33238
    • 1998-03-03
    • Takeshi IharaHiroshi Hamano
    • Takeshi IharaHiroshi Hamano
    • H03H7/01H03H7/03
    • H04L25/03878
    • An equalizing filter with an optimized frequency response and improved reliability and quality, for equalizing a reception signal so as to regain its original waveform. The equalizing filter comprises a low-pass filter and a high-frequency booster circuit. With its limited passband, the low-pass filter rejects the noise components contained in the signal being processed. The high-frequency booster circuit has such a frequency response that exhibits a stepwise gain increase at high frequencies. Those two elements, composed of reliable passive components, are coupled in series to provide a combined frequency response that is optimized for the design of highly sensitive optical receivers. As integral part of the high-frequency booster circuit, the equalizing filter employs an inductor made of a bonding wire. To obtain a predetermined inductance with high accuracy, the bonding wire is divided into a plurality of sections, which are used to make a daisy chain connection that bridges between a plurality of lands disposed on the substrate.
    • 具有优化的频率响应和改进的可靠性和质量的均衡滤波器,用于均衡接收信号以恢复其原始波形。 均衡滤波器包括低通滤波器和高频增强电路。 低通滤波器通过其有限的通带来抑制正在处理的信号中包含的噪声分量。 高频升压电路具有这样的频率响应,其在高频时呈逐步增益。 这些由可靠的无源元件组成的两个元件串联耦合,以提供针对高灵敏度光接收器的设计而优化的组合频率响应。 作为高频升压电路的组成部分,均衡滤波器采用由接合线构成的电感器。 为了以高精度获得预定的电感,接合线被分成多个部分,这些部分用于形成桥接在设置在基板上的多个焊盘之间的菊花链连接。