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    • 95. 发明申请
    • Apparatus for low noise and jitter injection in test applications
    • 用于测试应用中低噪声和抖动注入的设备
    • US20070080752A1
    • 2007-04-12
    • US11542025
    • 2006-10-03
    • Stephen Smith
    • Stephen Smith
    • H03L7/00
    • H03L7/099G01R31/31709H03L2207/06
    • A method and apparatus for a low noise low jitter signal source is provided. A Voltage Controlled Oscillator (VCO) is configured as part of a phase locked Loop (PLL) with a reference clock, a loop filter and a method of offsetting the Tune Voltage input to the Voltage Controlled Oscillator (VCO) to achieve low phase noise. A method and apparatus for precisely controlled jitter injection into a high speed data or clock signals is provided. Using IQ modulation techniques comprising an IQ modulator, by synchronously controlling the IQ modulator inputs precisely controlled phase shift for jitter injection are produced. This can also be used with the low noise low jitter signal source described herein.
    • 提供了一种低噪声低抖动信号源的方法和装置。 电压控制振荡器(VCO)被配置为具有参考时钟,环路滤波器和将调谐电压输入偏移到压控振荡器(VCO)的锁相环(PLL)的一部分,以实现低相位噪声。 提供了一种将精确控制的抖动注入高速数据或时钟信号的方法和装置。 使用包括IQ调制器的IQ调制技术,通过同步控制IQ调制器输入,产生用于抖动注入的精确控制的相移。 这也可以与本文所述的低噪声低抖动信号源一起使用。
    • 97. 发明申请
    • Fiber optic rotary joint with de-rotating prism
    • 带旋转棱镜的光纤旋转接头
    • US20070019908A1
    • 2007-01-25
    • US11187756
    • 2005-07-22
    • Michael O'BrienStephen SmithJames Snow
    • Michael O'BrienStephen SmithJames Snow
    • G02B7/182G02B6/34G02B6/26G02B6/42
    • G02B6/3604
    • A multi-channel fiber optic rotary joint (FORJ) includes an external housing, a stationary collimator array, a rotating collimator array, an all-reflective de-rotating prism and a gear ratio. The external housing contains an internal cavity having a longitudinal rotation axis. The stationary collimator array is affixed to the external housing approximate a first end of the internal cavity. The rotating collimator array is rotatably attached to the external housing approximate a second end of the cavity. The second end of the cavity is opposite the first end of the cavity. The rotating collimator array is configured to rotate about the rotation axis. The de-rotating prism is located along the rotation axis within the internal cavity between the stationary collimator array and the rotating collimator array. The prism is retained in a prism housing, which is rotatably attached to the external housing and the prism housing is configured to rotate about the rotation axis.
    • 多通道光纤旋转接头(FORJ)包括外壳,固定准直器阵列,旋转准直器阵列,全反射去旋转棱镜和齿轮比。 外壳包含具有纵向旋转轴线的内腔。 固定准直器阵列固定到外壳上,近似于内腔的第一端。 旋转准直器阵列可旋转地附接到外壳上,近似于腔的第二端。 空腔的第二端与空腔的第一端相对。 旋转准直器阵列被配置为围绕旋转轴线旋转。 去旋转棱镜沿固定准直器阵列和旋转准直器阵列之间的内腔内的旋转轴线定位。 棱镜被保持在棱镜壳体中,该棱镜壳体可旋转地附接到外部壳体,并且棱镜壳体构造成围绕旋转轴线旋转。