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1. (WO2018063231) APPARATUS, SYSTEM AND METHOD OF GENERATING A FREQUENCY OUTPUT WITH A DIGITALLY CONTROLLED RING OSCILLATOR (DCRO)

Pub. No.:    WO/2018/063231    International Application No.:    PCT/US2016/054392
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Fri Sep 30 01:59:59 CEST 2016
IPC: H03L 7/099
Applicants: INTEL IP CORPORATION
Inventors: RAVI, Ashoke
BANIN, Rotem
DEGANI, Ofir
BEN-HAIM, David
KALMANOVICH, Yigal
Title: APPARATUS, SYSTEM AND METHOD OF GENERATING A FREQUENCY OUTPUT WITH A DIGITALLY CONTROLLED RING OSCILLATOR (DCRO)
Abstract:
For example, a digital PLL may include a digitally controlled Ring Oscillator (DCRO) configured to generate a frequency output based on a control signal, the DCRO comprising a plurality of stages in a cyclic order, a first stage of the plurality of stages comprising a plurality of inverter modules controlled by the control signal and comprising a plurality of outputs that drive inputs of a plurality of second stages in the plurality of stages; a decoder to decode a phase of the DCRO based on a plurality of sampled phases of the plurality of stages of the DCRO; and a phase error estimator to estimate a phase error based on the phase of the DCRO and a frequency control word, the control signal is based on the phase error.