First-order loop control configuration for a phase-rotator based

Details First-order loop control configuration for a phase-rotator based First-order loop control configuration for a phase-rotator based

1994-06-07

1996-06-11

Tse, Young T.

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375362, 375376, 327156, H03D 302

Patent

active

055263801

ABSTRACT:
In an embodiment of the present invention is electronic circuitry for producing a clock signal, and its quadrature, whose phase matches the phase of input data in response to receipt of the input data and a reference clock signal, the circuitry comprises: circuitry for providing the quadrature of the reference clock signal; circuitry for providing a Q-phase quadrant pointer in response to the input data, and the reference clock; circuitry for providing an I-phase quadrant pointer in response to the input data, and the quadrature reference clock; circuitry for providing a phase signal in response to the produced clock, the quadrature of the produced clock and the input data; circuitry for providing a phase-change signal for specifying whether to rotate the phase of the produced clock signal in one direction or the other, the circuitry operable in response to the I-phase quadrant pointer, Q-phase quadrant pointer and the produced clock signal; a first phase rotator for changing the phase of the produced clock in response to the phase-change signal, the I-phase quadrant pointer, the Q-phase quadrant pointer, the reference clock, and the quadrature reference clock; and a second phase rotator for changing the phase of the quadrature of the produced clock in response to the phase-change signal, the I-phase quadrant pointer, the Q-phase quadrant pointer, the reference clock, and the quadrature reference clock.

REFERENCES:
patent: 4599732 (1986-07-01), LeFever
patent: 4816775 (1989-03-01), Ryan
patent: 5311545 (1994-05-01), Critchlow
Thomas H. Lee et al., FA 18.6: A 2.5V Delay-Locked Loop for an 18 Mb 500 MB/s DRAM, IEEE International Solid-State Circuits Conference, Jul./94, pp. 300-301.
Lothar Schmidt and Hans-Martin Rein, Continuously Variable Gigahertz Phase-Shifter IC Covering More than One Frequency Decade, IEEE Journal of Solid-State Circuits, vol. 27, No. 6, Jun. 1992, pp. 854-862.

Affiliated with

Also associated with

Rating

First-order loop control configuration for a phase-rotator based does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with First-order loop control configuration for a phase-rotator based, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First-order loop control configuration for a phase-rotator based will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-359745