Agilent Technologies, Inc.

Charles L Wang

Benny W H Lai

Charles E Moore

Philip Wilfred Fisher

Tony Lin

Methods and systems for generating and synchronizing multiple clocks are disclosed herein that have extremely low skew across multiple channels and latency that is both minimal and well-defined. A phase-locked loop circuit generates a plurality of clock signals to synchronize channel circuits that receive core data streams. The channel circuits convert the core data streams into serial data streams. The phase-locked loop circuit or another phase-locked loop circuit generates a core clock signal for the registered transfer of the core data streams to the channel circuits. One or more of the plurality of clock signals may be distributed to the channel circuits by a register-to-register transfer.

Method for synchronizing multiple serial data streams using a plurality of clock signals

A method and system for receiving CIMT encoded data transmitted in simplex mode. The receiver (,) is adapted to receive a stream of digital data and analyze successive portions thereof to identify a predetermined pattern of data. The receiver (,) outputs the received digital data in response to a detection of the predetermined pattern of data and, in the alternative, outputs other data in response to a failure to detect the predetermined pattern of data. In the illustrative embodiment, the stream of digital data is transmitted as conditional invert master transition encoded simplex data. The receiver (,) includes a CIMT decoder (,) which analyzes the input data to identify a master transition therein. The receiver (,) uses a local clock to analyze successive portions of the received data stream and word alignment logic to identify a master transition therein. In the best mode, the inventive teachings are implemented in a communications system having a CIMT encoder (,) which transmits a time scrambled flag bit along with a stream of CIMT encoded data. The receiver (,) descrambles the flag bit and uses it to detect the master transition therein in the presence of static data.

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San Jose, CA, United States of America

Charles L Wang