Sitime Corporation

Centillium Communications, Inc.

Sathi Perumal

Erno H Klaassen

Steven R Blackwell

Crist Y Lu

Trevor Pearman

Simon Huang

A method for generating a temperature-compensated timing signal that includes counting, within an update interval, a first number of oscillations of a first micro-electromechanical (MEMS) resonator, a second number of oscillations of a second MEMS resonator and a third number of oscillations of a digitally controlled oscillator (DCO), computing a target DCO count based on the first number and second number of oscillations, computing a loop error signal based on the target DCO count and the third number of oscillations, and modifying an output frequency of a temperature-dependent (DCO) timing signal based on the loop error signal. The duration of the update interval may also be modified based on temperature conditions, and the update interval may also be interrupted and the output frequency immediately adjusted, if a significant temperature change is detected. Thus, dynamic and precise temperature compensation is achieved that accommodates constant, slowly changing, and rapidly changing temperature conditions.

Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators

Techniques for carrying out multi-pair mode transmission in a DSL system are disclosed. A data stream is transmitted to a receiving node on two or more bonded channels. At the receiving node, the bonded channels are processed to yield the original data stream. Differential delay between the two or more channels of the bond group is dynamically neutralized by keying on the channel having the greatest latency, although static mechanisms for neutralizing the differential delay can also be used.

Channel bonding in SHDSL systems

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Fremont, CA, United States of America

Sathi Perumal