公开(公告)号：US06707025B2

公开(公告)日：2004-03-16

申请号：US10161947

申请日：2002-06-04

Applicant: Zoltan D Azary ,  Joseph N West ,  Mohan Gurunathan

Inventor： Zoltan D Azary ,  Joseph N West ,  Mohan Gurunathan

IPC: H01J4014

CPC classification number: H03F3/087 ,  G01C15/006 ,  G01J1/44 ,  H03F3/68 ,  H03F3/72 ,  H04B10/693

Abstract: A high dynamic range receiver includes a detector that produces a current at a pair of terminals. A first gain element, implemented as a current-to-voltage converter for example, is coupled to the first terminal, receiving the current and generating a first output signal corresponding to the current. A second gain element, implemented as a current-to-voltage converter for example, is coupled to the second terminal, receiving the current and generating a second output signal corresponding to the received current. A switch selectively couples the first output signal or the second output signal to a port based on a comparison of at least one of the first output signal and the second output signal to a threshold.

Abstract translation: 高动态范围接收器包括在一对端子处产生电流的检测器。 实现为电流 - 电压转换器的第一增益元件例如被耦合到第一端子，接收电流并产生对应于电流的第一输出信号。 实现为电流 - 电压转换器的第二增益元件例如被耦合到第二端子，接收电流并产生对应于接收电流的第二输出信号。 开关基于第一输出信号和第二输出信号中的至少一个与阈值的比较，将第一输出信号或第二输出信号选择性地耦合到端口。

公开(公告)号：US06548802B2

公开(公告)日：2003-04-15

申请号：US09838912

申请日：2001-04-20

Applicant: Mohan Gurunathan ,  Zoltan D. Azary ,  Greg C. Richtenburg

Inventor： Mohan Gurunathan ,  Zoltan D. Azary ,  Greg C. Richtenburg

IPC: H01J4014

CPC classification number: H04B10/697

Abstract: A zero calibration system and method for an optical receiver include an illuminated photodetector, switchably coupled to an amplifier. The photodetector is de-coupled from the amplifier while illumination of the photodetector is maintained and an error signal is measured at the output of the amplifier The photodetector is then coupled to the amplifier and subsequent signals measured at the output of the amplifier are corrected according to the measured error signal, based on a comparison of the relative values of a feedback resistor, coupled between the output and an input of the amplifier, and an equivalent resistance of the photodetector. When the ratio of the feedback resistor to the equivalent resistance does not exceed a predetermined threshold, the subsequently measured signals at the output of the amplifier are corrected by offsetting the subsequently measured signals by the measured error signal. When the ratio exceeds the predetermined threshold, the subsequently measured signals at the output of the amplifier are corrected by offsetting the subsequently measured signals by the measured error signal as modified by a correction factor.

公开(公告)号：US06362878B1

公开(公告)日：2002-03-26

申请号：US09430338

申请日：1999-10-29

Applicant: Gary Wang ,  Paul S. Bussard ,  Zoltan D. Azary ,  Kenneth R. Wildnauer ,  Peter Egerton

Inventor： Gary Wang ,  Paul S. Bussard ,  Zoltan D. Azary ,  Kenneth R. Wildnauer ,  Peter Egerton

IPC: G01J300

CPC classification number: G01J3/28 ,  G01J2003/2866

Abstract: Improved calibration of optical wavelength measuring instruments. In a first embodiment, improved calibration is achieved in an optical wavelength measuring instrument by performing calibration measurements at a plurality of known wavelengths and using an average calibration constant derived from the plurality of measurements. In a second embodiment, improved calibration is achieved by performing calibration measurements at a plurality of known wavelengths and calculating a linear or higher order calibration model, or a periodic model. These approaches may be extended by segmenting the wavelength range and using different calculated calibration values, or different calibration models, for each segment.

Abstract translation: 改进光学波长测量仪器的校准。 在第一实施例中，通过在多个已知波长下执行校准测量并使用从多个测量导出的平均校准常数，在光学波长测量仪器中实现了改进的校准。 在第二实施例中，通过以多个已知波长执行校准测量并计算线性或更高阶校准模型或周期性模型来实现改进的校准。 这些方法可以通过分段波长范围和使用不同计算的校准值或不同的校准模型来扩展。

公开(公告)号：US06598196B1

公开(公告)日：2003-07-22

申请号：US09515577

申请日：2000-02-29

Applicant: Paul E. Bussard ,  Zoltan D. Azary

Inventor： Paul E. Bussard ,  Zoltan D. Azary

IPC: G06F1130

CPC classification number: G01D5/24452 ,  G01D5/2449

Abstract: Measurement and correction of encoder errors in a servo loop. By driving the servo system on a predetermined trajectory such that encoder errors occur at frequencies outside the servo loop response, these errors are sampled. Sampled encoder error data is filtered to produce correction data, which may be applied inside or outside the servo loop.

Abstract translation: 伺服回路中编码器误差的测量和校正。 通过在预定轨迹上驱动伺服系统使得编码器错误出现在伺服环路响应之外的频率处，这些误差被采样。 对采样的编码器错误数据进行滤波以产生校正数据，这可以应用于伺服环路内部或外部。