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    • 1. 发明授权
    • ECL to CMOS level conversion circuit
    • ECL到CMOS电平转换电路
    • US5287019A
    • 1994-02-15
    • US788369
    • 1991-11-06
    • Kazuyuki NonakaShinji SaitoTetsuya AisakaTakehiro AkiyamaKouzi Takekawa
    • Kazuyuki NonakaShinji SaitoTetsuya AisakaTakehiro AkiyamaKouzi Takekawa
    • H03K19/00H03K19/0175H03K19/018H03K19/092H03K3/01
    • H03K19/0016H03K19/017527H03K19/01812
    • A level conversion circuit includes an ECL logic circuit including a current switch circuit having first and second transistors, each of the transistors having an emitter coupled to each other and at least one thereof receiving an input signal of ECL logic level, and an output transistor coupled to a collector of at least one of the first and second transistors; a current control circuit including a current mirror circuit having third and fourth transistors, at least one of the transistors being coupled to an output end of the output transistor, and controlling a current flowing through the output to thereby carry out a level conversion of a signal at the output end; and a switch circuit operative coupled to the current control circuit. The switch circuit responds to a control signal and thus controls a supply of a current or a break thereof from the output transistor to the current control circuit. As a result, it is possible to decrease power dissipation in the present level conversion circuit without spoiling high speed operation thereof in a stand-by state of an apparatus or system to which it is applied.
    • 电平转换电路包括ECL逻辑电路,其包括具有第一和第二晶体管的电流开关电路,每个晶体管具有彼此耦合的发射极,并且其至少一个接收ECL逻辑电平的输入信号,以及耦合的输出晶体管 耦合到所述第一和第二晶体管中的至少一个晶体管的集电极; 电流控制电路,包括具有第三和第四晶体管的电流镜电路,至少一个晶体管耦合到输出晶体管的输出端,并且控制流过输出的电流,从而执行信号的电平转换 在输出端; 以及可操作地耦合到电流控制电路的开关电路。 开关电路响应于控制信号,从而控制从输出晶体管到电流控制电路的电流或断路的供应。 结果,可以在其应用的装置或系统的待机状态下降低当前电平转换电路中的功率消耗而不破坏其高速操作。
    • 2. 发明授权
    • PLL frequency synthesizer circuit
    • PLL频率合成器电路
    • US5410571A
    • 1995-04-25
    • US121546
    • 1993-09-16
    • Masayuki YonekawaTakehiro AkiyamaShinji SaitoTetsuya AisakaMinoru Takagi
    • Masayuki YonekawaTakehiro AkiyamaShinji SaitoTetsuya AisakaMinoru Takagi
    • H03L7/089H03L7/095H03L7/107H03L7/183H03D3/24
    • H03L7/107H03L7/0891H03L7/0898H03L7/095H03L7/183Y10S331/02
    • A reference frequency divider divides a clock signal into a reference frequency signal, and outputs it. A comparison frequency divider circuit divides an output signal from a voltage controlled oscillator, and outputs it as a comparison signal. The reference signal and comparison signal are coupled to a phase comparator. The phase comparator detects the phase difference between the reference signal and comparison signal, and outputs a phase difference signal. A charge pump outputs a voltage signal in response to the phase difference signal from the phase comparator. A low pass filter smooths out the voltage signal from the charge pump to remove the high frequency components, and outputs a controlled voltage signal. A voltage controlled oscillator outputs an output signal with the frequency relating to the voltage value of the controlled voltage signal from the low pass filter. A frequency difference determining circuit compares the reference signal with the comparison signal. The circuit outputs a signal indicative of the frequency locked when the frequency difference is within the preset range, and outputs a signal indicative of the frequency unlocked when the difference of the frequency exceeds the preset range.
    • 参考分频器将时钟信号分频为参考频率信号,并将其输出。 比较分频器电路分压来自压控振荡器的输出信号,并将其作为比较信号输出。 参考信号和比较信号耦合到相位比较器。 相位比较器检测参考信号和比较信号之间的相位差,并输出相位差信号。 电荷泵响应于来自相位比较器的相位差信号输出电压信号。 低通滤波器平滑电荷泵的电压信号,去除高频分量,并输出受控电压信号。 压控振荡器以与低通滤波器的受控电压信号的电压值相关的频率输出输出信号。 频率差确定电路将参考信号与比较信号进行比较。 当频率差在预设范围内时,电路输出指示频率被锁定的信号,并且当频率差超过预设范围时输出表示频率被解锁的信号。
    • 10. 发明申请
    • SEMICONDUCTOR LIGHT EMITTING DEVICE
    • 半导体发光器件
    • US20120007113A1
    • 2012-01-12
    • US13032907
    • 2011-02-23
    • Jongil HwangShinji SaitoMaki SugaiRei HashimotoYasushi HattoriMasaki TohyamaShinya Nunoue
    • Jongil HwangShinji SaitoMaki SugaiRei HashimotoYasushi HattoriMasaki TohyamaShinya Nunoue
    • H01L33/26
    • H01L33/06H01L33/32
    • According to one embodiment, a semiconductor light emitting device includes an n-type semiconductor layer, a p-type semiconductor layer, a well layer, a barrier layer, an Al-containing layer, and an intermediate layer. The p-type semiconductor layer is provided on a side of [0001] direction of the n-type semiconductor layer. The well layer, the barrier layer, the Al-containing layer and the intermediate layer are disposed between the n-type semiconductor layer and the p-type semiconductor layer subsequently. The Al-containing layer has a larger band gap energy than the barrier layer, a smaller lattice constant than the n-type semiconductor layer, and a composition of Alx1Ga1-x1-y1Iny1N. The intermediate layer has a larger band gap energy than the well layer, and has a first portion and a second portion provided between the first portion and the p-type semiconductor layer. A band gap energy of the first portion is smaller than that of the second portion.
    • 根据一个实施例,半导体发光器件包括n型半导体层,p型半导体层,阱层,阻挡层,含Al层和中间层。 p型半导体层设置在n型半导体层的[0001]方向的一侧。 阱层,阻挡层,含Al层和中间层随后设置在n型半导体层和p型半导体层之间。 含Al层具有比阻挡层更大的带隙能量,比n型半导体层更小的晶格常数以及Al x Ga 1-x 1-y 1 In y N 1的组成。 中间层具有比阱层更大的带隙能量,并且具有设置在第一部分和p型半导体层之间的第一部分和第二部分。 第一部分的带隙能量小于第二部分的带隙能量。