Phase rotator and data recovery receiver incorporating said...

Details Phase rotator and data recovery receiver incorporating said... Phase rotator and data recovery receiver incorporating said...

2006-05-23

2006-05-23

Chin, Stephen (Department: 2634)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

Reexamination Certificate

active

07050522

ABSTRACT:
A phase rotator device for phase shifting an oscillating signal, including an input device having at least one input channel for receiving at least one phase of the oscillating signal and an output device having at least one output channel for delivering at least one phase of the oscillating signal with a controlled phase shift. For each output channel, the phase rotator includes a weighting device for weighting the value of the oscillating signal at each input channel by a respective weighting coefficient, and a summing device for summing the weighted signal values at each input channel and delivering the summed value as a shifted output phase at the output channel. Additionally, the phase rotator device includes a weighting coefficient supply device responsive to a phase shift control signal for controllably supplying evolving weighting coefficients to the weighting device, thereby to create a phase shift at the output channel.

REFERENCES:
patent: 4639939 (1987-01-01), Hirosaki et al.
patent: 6628738 (2003-09-01), Peeters et al.

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