Hybrid AFC using DCXO and RF PLL

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United States of America Patent

PATENT NO 8873682
SERIAL NO

13631421

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Abstract

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A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

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Patent Owner(s)

  • AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Buyanin, Michael San Diego, US 3 26
de, Beer Cobus San Diego, US 1 4
Kahrizi, Masoud Irvine, US 55 333
Mehio, Rami San Diego, US 39 362

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