Method And System For Phase Alignment Of Multiple Phased Locked Loops
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Abstract
A system and method for phase alignment of multiple PLLs are disclosed. The system comprises a plurality N of PLLs (PLL_1 . . . PLL_N) and a plurality N of phase detectors (DET_1 . . . DET_N). The plurality N of phase detectors and the plurality N of PLLs are connected in a loop such that an i-th phase detector (DET_i) is configured to receive an i-th feedback signal (FB_i) generated from the i-th PLL and an (i+1)-th feedback signal (FB_i+1) generated from the (i+1)-th PLL, and the N-th phase detector (DET_N) is configured to receive the first feedback signal (FB_1) generated from the first PLL and the N-th feedback signal (FB_N) generated from the N-th PLL. The an i-th phase detector (DET_i) is configured to generate an i-th adjustment signal indicating an i-th phase difference between the i-th and (i+1)-th feedback signals for adjusting a phase of the i-th or (i+1)-th PLL, wherein i=1, 2, 3, . . . N−1. The N-th phase detector (DET_N) is configured to generate a N-th adjustment signal indicating a N-th phase difference between the first and N-th feedback signals.
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Citations
31 Claims
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1-16. -16. (canceled)
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17. A system for phase alignment of multiple phase adjustable Phased Locked Loops (PLLs), the system comprising:
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a plurality N of PLLs, wherein each PLL comprises; an oscillator configured to generate a respective output signal; a frequency divider configured to generate a respective feedback signal by dividing the respective output signal; a phase comparator arrangement configured to output a respective control signal to control the oscillator in response to a detection of a phase deviation between a reference signal and the feedback signal; a plurality N of phase detectors, wherein the plurality N of phase detectors and the plurality N of PLLs are connected in a loop such that; an i-th phase detector is configured to receive an i-th feedback signal generated from the i-th PLL and an (i+1)-th feedback signal generated from the (i+1)-th PLL, wherein i=1, 2, 3, . . . N−
1;the N-th phase detector is configured to receive the first feedback signal generated from the first PLL and the N-th feedback signal generated from the N-th PLL; wherein the i-th phase detector is configured to generate an i-th adjustment signal indicating an i-th phase difference between the i-th and (i+1)-th feedback signals for adjusting a phase of the i-th or (i+1)-th PLL; and wherein the N-th phase detector is configured to generate a N-th adjustment signal indicating a N-th phase difference between the first and N-th feedback signals. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A communication device, comprising
a system for phase alignment of multiple phase adjustable Phased Locked Loops (PLLs), the system comprising: -
a plurality N of PLLs, wherein each PLL comprises; an oscillator configured to generate a respective output signal; a frequency divider configured to generate a respective feedback signal by dividing the respective output signal; a phase comparator arrangement configured to output a respective control signal to control the oscillator in response to a detection of a phase deviation between a reference signal and the feedback signal; a plurality N of phase detectors, wherein the plurality N of phase detectors and the plurality N of PLLs are connected in a loop such that; an i-th phase detector is configured to receive an i-th feedback signal generated from the i-th PLL and an (i+1)-th feedback signal generated from the (i+1)-th PLL, wherein i=1, 2, 3, . . . N−
1;the N-th phase detector is configured to receive the first feedback signal generated from the first PLL and the N-th feedback signal generated from the N-th PLL; wherein the i-th phase detector is configured to generate an i-th adjustment signal indicating an i-th phase difference between the i-th and (i+1)-th feedback signals for adjusting a phase of the i-th or (i+1)-th PLL; and wherein the N-th phase detector is configured to generate a N-th adjustment signal indicating a N-th phase difference between the first and N-th feedback signals. - View Dependent Claims (28)
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29. A method in a system for phase alignment of multiple phase adjustable Phased Locked Loops (PLLs), the method comprising:
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generating a plurality N of output signals from a plurality N of PLLs; generating a plurality N of feedback signals by dividing the respective N output signals from the plurality N of PLLs; generating a plurality N of adjustment signals from a plurality N of phase detectors, wherein; an i-th adjustment signal is generated from an i-th phase detector, indicating an i-th phase difference between the i-th and (i+1)-th feedback signals; and the N-th adjustment signal is generated from the N-th phase detector, indicating an N-th phase difference between the first and N-th feedback signals; and adjusting a phase of the i-th or (i+1)-th PLL based on the i-th adjustment signal;
wherein i=1, 2, 3, . . . N−
1. - View Dependent Claims (30, 31)
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Specification