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    • 1. 发明授权
    • Digital signal exchange equipment
    • 数字信号交换设备
    • US5276439A
    • 1994-01-04
    • US969519
    • 1992-10-30
    • Takehiko AtsumiHiroyuki IbeTaro ShibagakiTakeshi Ozeki
    • Takehiko AtsumiHiroyuki IbeTaro ShibagakiTakeshi Ozeki
    • H04Q11/04H04B3/38
    • H04Q11/04
    • A digital signal exchange equipment is disclosed which is constructed of a combination of selector modules each constituted by a plurality of gate arrays as a parallel unit in a column direction. The respective gate array comprises a first gate for selecting one line from an n number of first input lines and connecting it to an output line, a second gate for selecting one line from an output line of the first gate and one second input line and connecting it to the second gate and a flip-flop for wave-shaping an output of the second gate and, at the same time, taking synchronization among the respective gate array. The selector module as set forth above is constructed of a semiconductor circuit device. When, in particular, a plurality of selector modules are combined together, they are arranged as a k-column/l-row array in which input bus lines are each connected to each common row and an n number of output lines are connected for each row to an n number of second input lines of the next-row selector module.
    • 公开了一种数字信号交换设备,其由选择器模块的组合构成,每个选择器模块由沿列方向的并联单元的多个门阵列构成。 相应的门阵列包括用于从n个第一输入线选择一条线并将其连接到输出线的第一栅极,用于从第一栅极的输出线选择一条线的第二栅极和一个第二输入线和连接 它到第二栅极和用于对第二栅极的输出进行波形整形的触发器,并且同时在各个栅极阵列之间取得同步。 如上所述的选择器模块由半导体电路器件构成。 特别地,将多个选择器模块组合在一起时,它们被布置为k列/ l行阵列,其中输入总线各自连接到每个公共行,并且每个连接n个输出线 行到下一行选择器模块的n个第二输入行。
    • 5. 发明授权
    • Voltage-controlled variable-frequency pulse oscillator
    • 压控可变频脉冲振荡器
    • US4644300A
    • 1987-02-17
    • US685165
    • 1984-12-21
    • Hiroyuki IbeTaro Shibagaki
    • Hiroyuki IbeTaro Shibagaki
    • H03K3/014H03K3/02H03K3/0231H03K3/03H03K3/26
    • H03K3/014H03K3/0231H03K3/03H03K3/0322
    • The voltage-controlled variable-frequency pulse oscillator in accordance with the present invention comprises an integrating capacitor, a variable current source for generating charging current for said integrating capacitor in response to the controlling voltage, a fixed current source for discharging said capacitor, a switching circuit for controlling the discharge of said capacitor, a comparator for outputting a discrimination signal by comparing the voltage of the capacitor and a reference voltage, and a multivibrator for receiving the discrimination signal from the comparator and for outputting a pulse signal with a frequency corresponding to the controlling voltage from the variable current source. The multivibrator comprises an R-S flip-flop for receiving the discrimination signal output by the comparator at its set side OR-NOR gates, and receiving and inverting the output of the reset side gate which is delayed by a prescribed time to the reset side OR-NOR gate. The R-S flip-flop is constructed to permit the oscillation output with a prescribed frequency to be taken out from the reset side OR-NOR gates, and the oscillation output of the R-S flip-flop controls the drive of the switching circuit. Therefore, the multivibrator starts oscillation on its own with a prescribed width when the capacitor voltage grows very large at the time of turning the power supply on or at the time of generation of an excessively large current where the output of the comparator continues to stay at a constant value. Furthermore, the current value of the fixed current source is set at more than twice the maximum current value of the variable current source. Because of this, the large voltage of the capacitor decreases gradually with ups and downs, and the comparator inverts after a certain time, the multivibrator discontinues the self oscillation, and the ordinary operation of the device takes place.
    • 根据本发明的压控可变频脉冲振荡器包括积分电容器,用于响应于控制电压产生用于所述积分电容器的充电电流的可变电流源,用于放电所述电容器的固定电流源,开关 用于控制所述电容器的放电的电路,比较器,用于通过比较电容器的电压和参考电压来输出鉴别信号;以及多谐振荡器,用于从比较器接收鉴别信号,并输出具有对应于 来自可变电流源的控制电压。 该多谐振荡器包括一个RS触发器,用于接收比较器在其设定侧的或非或非门输出的识别信号,并将延迟了规定时间的复位侧门的输出接收和反相至复位端OR- NOR门 R-S触发器被构造成允许从复位侧或非或非门取出规定频率的振荡输出,并且R-S触发器的振荡输出控制开关电路的驱动。 因此,当在比较器的输出继续保持的电流过大或者过大电流产生时电容器电压增大非常大时,多谐振荡器自身开始以规定的宽度振荡 恒定值。 此外,固定电流源的电流值设定为可变电流源的最大电流值的两倍以上。 因此,电容器的大电压随着上升和下降而逐渐减小,并且比较器在一定时间后反转,多谐振荡器停止自振荡,并且发生器件的普通操作。
    • 6. 发明授权
    • Zero signal state detecting circuit
    • 零信号状态检测电路
    • US4795919A
    • 1989-01-03
    • US55798
    • 1987-06-01
    • Sadao TanikoshiHiroyuki IbeTaro Shibagaki
    • Sadao TanikoshiHiroyuki IbeTaro Shibagaki
    • H03K5/01G01R19/175H03K5/08H03K5/19H04B17/00H03K5/153
    • H04B10/6973G01R19/175
    • This invention provides a zero signal state detecting circuit for detecting zero signal state of the signal in an optical receiver or optical repeater. The zero signal state detecting circuit in accordance with the present invention comprises a level shifting circuit, a smoothing circuit, a first comparator, a peak detecting circuit and a second comparator. The output signal from the timing circuit to produce two output signals is shifted by the level shifting circuit. One of the two outputs of the level shifting circuit is smoothed by the smoothing circuit. The output of the smoothing circuit and the other one of the outputs of the level shifting circuit are compared by the first comparator and the output is detected by the peak detecting circuit. The output of the peak detecting circuit is compared by the second comparator against a reference voltage, and the zero signal state of the optical receiving signal is detected.
    • 本发明提供一种用于检测光接收器或光中继器中的信号的零信号状态的零信号状态检测电路。 根据本发明的零信号状态检测电路包括电平移位电路,平滑电路,第一比较器,峰值检测电路和第二比较器。 来自定时电路的产生两个输出信号的输出信号被电平移位电路移位。 电平移位电路的两个输出之一由平滑电路平滑。 平滑电路的输出和电平移位电路的另一个输出由第一比较器进行比较,并且由峰值检测电路检测输出。 峰值检测电路的输出由第二比较器与参考电压进行比较,并检测光接收信号的零信号状态。
    • 8. 发明授权
    • Frame synchronization circuit
    • 帧同步电路
    • US5140618A
    • 1992-08-18
    • US651013
    • 1991-02-05
    • Osamu KinoshitaTakako MoriHideki IshibashiHiroyuki IbeTakehiko Atsumi
    • Osamu KinoshitaTakako MoriHideki IshibashiHiroyuki IbeTakehiko Atsumi
    • H04J3/00H04J3/06H04L7/08
    • H04J3/0608
    • In a frame synchronization circuit, a serial data signal, which includes a frame synchronization code constituted by an M number of bits in one frame, is converted by a serial/parallel converting circuit to a parallel data signal of a 2M-1 number of bits. An M number of pattern detectors of a first synchronization detecting circuit detect the code pattern of the first block of the frame synchronization code from the parallel data signal. A selection signal generating circuit holds outputs of the pattern detectors, and outputs them as a selection signal designating the bit position allotted to the pattern detector which detects the synchronization code pattern. An output of the serial/parallel converting circuit is delayed by a time required for the above-mentioned processing, and supplied to a selector, which selectively outputs an M-bit data signal corresponding to the bit position designated by the selection signal.
    • 在帧同步电路中,包括由一帧中的M个位组成的帧同步码的串行数据信号由串/并转换电路转换为2M-1位的并行数据信号 。 M个第一同步检测电路的模式检测器从并行数据信号检测帧同步码的第一块的码模式。 选择信号发生电路保持图案检测器的输出,并输出它们作为指定分配给检测同步码模式的图案检测器的位位置的选择信号。 串行/并行转换电路的输出被延迟上述处理所需的时间,并提供给选择器,选择器输出与由选择信号指定的位位置对应的M位数据信号。
    • 9. 发明授权
    • Optical network analyzer for measuring the amplitude characteristics and
group delay time dispersion characteristics of an optical circuit device
    • 用于测量光电路器件的振幅特性和组延迟时间色散特性的光网络分析仪
    • US5390017A
    • 1995-02-14
    • US111002
    • 1993-08-24
    • Takeshi OzekiManish SharmaHiroyuki Ibe
    • Takeshi OzekiManish SharmaHiroyuki Ibe
    • G01J9/00G01J9/02G01M11/02G01N21/84G01N21/41
    • G01J9/02
    • An optical network analyzer measures the amplitude characteristics and group delay time dispersion characteristics of an optical circuit device. In the optical network analyzer, the intensity of the light generated by a first light source is modulated by use of a modulation signal having a constant frequency and a constant amplitude. Part of the intensity-modulated light is used as a reference optical signal, and the remaining part is made to pass through the optical circuit device, thus obtaining an optical signal to be measured. The reference optical signal and the optical signal to be measured are photoelectrically converted into electric signals, and the modulated signal components of the electric signals are compared with each other, thus obtaining an amplitude ratio and a phase difference. The optical frequency of the first light source is swept in a constant cycle, and the amplitude ratio and phase difference are displayed on a display device in synchronism with the frequency sweeping. To implement an optical frequency marker, light having an arbitrarily-designated optical frequency is generated by a second light source. The light generated by the second light source is made to join part of the light generated by the first light source, so as to produce a peak at the designated optical frequency. The peak is electrically extracted and superimposed on the amplitude ratio and phase difference displayed on the display device.
    • 光网络分析仪测量光电路器件的振幅特性和组延迟时间色散特性。 在光网络分析仪中,通过使用具有恒定频率和恒定振幅的调制信号来调制由第一光源产生的光的强度。 将强度调制光的一部分用作参考光信号,并使剩余部分通过光电路器件,从而获得待测量的光信号。 参考光信号和被测光信号被光电转换成电信号,并将电信号的调制信号分量相互比较,从而获得振幅比和相位差。 第一光源的光频率以恒定周期扫描,并且幅频比和相位差与扫频同步地显示在显示装置上。 为了实现光频标记,通过第二光源产生具有任意指定的光频率的光。 使由第二光源产生的光连接到由第一光源产生的光的一部分,以便以指定的光频率产生峰。 该峰被电提取并叠加在显示装置上显示的振幅比和相位差上。