Qualcomm Incorporated

Charles Chang-I Wang

Emanuele Lopelli

Salvatore Pennisi

Shervin Moloudi

Richard McConnell

Magnus Olov Wiklund

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive an otw signal that is associated with low-path pass information and transmission data. The apparatus may apply a cost function and an update function to the otw signal prior to sending the otw signal to an oscillator. The apparatus may determine a correction factor for use in estimating a gain of the oscillator based at least in part on an output of the update function.

Apparatus and method for an all-digital phase lock loop

Aspects of the present disclosure are generally directed to techniques and apparatus for estimating a gain of a VCO in a PLL. In certain aspects, the technique includes calculating a C-V characteristic of a varactor matched to another varactor in the VCO. The technique also includes estimating the gain of the VCO based on the C-V characteristic of the varactor, a tank inductance of the VCO, and an output frequency of the VCO. Aspects of the present disclosure allow for estimating the gain of the VCO while the PLL remains in operation.

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Irvine, CA, United States of America

Charles Chang-I Wang