Pulse or digital communications – Testing
Reexamination Certificate
2003-01-29
2008-12-02
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Testing
Reexamination Certificate
active
07460589
ABSTRACT:
Apparatus and method are disclosed for constructing an eye pattern from a serial data signal within a receiver used in a serial data communication system. The receiver is used to receive the serial data signal and generates an internal clock signal from the serial data signal using, at least in part, a CDR circuit. Timing data corresponding to a current phase of the clock signal is also generated within the receiver using an interpolator circuit. The serial data signal is sampled by an ADC using the clock signal to generate sampled data. The sampled data and timing data are processed within the receiver by a data processor to generate the eye pattern. The resultant eye pattern may be analyzed within the receiver with respect to at least one characteristic of the eye pattern. At least one parameter of the receiver may be adjusted in response to the foregoing analysis.
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Ellemeyer, T. et al., “A 10-Gb/s Eye-Opening Monitor IC for Decision-Guided Adaptation of the Frequency Response of an Optical Receiver,” IEEE Journal of Solid-State Circuits, IEEE Inc. New York, US, vol. 35, No. 12, Dec. 2000, pp. 1958-1963.
Fujimori Ichiro
Nejad Mohammad Sarhang
Ahn Sam K
Broadcom Corporation
McAndrews Held & Malloy Ltd.
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