公开(公告)号：US20240097689A1

公开(公告)日：2024-03-21

申请号：US17933327

申请日：2022-09-19

Applicant: QUALCOMM Incorporated

Inventor： Jianjun YU ,  Tomas O'SULLIVAN ,  Razak HOSSAIN ,  Lai Kan LEUNG

IPC: H03L7/197 ,  H04L7/033

CPC classification number: H03L7/1976 ,  H04L7/033

Abstract: Aspects of the present disclosure provide techniques and apparatus for synchronizing phase-locked loop (PLL) circuits. An example method of operating PLL circuits includes obtaining an indication to perform a synchronizing action at a first PLL circuit and a second PLL circuit; and performing the synchronizing action at the first PLL circuit and the second PLL circuit in response to obtaining the indication.

公开(公告)号：US20240106623A1

公开(公告)日：2024-03-28

申请号：US17935052

申请日：2022-09-23

Applicant: QUALCOMM Incorporated

Inventor： Gang LIU ,  Xiaotie WU ,  Razak HOSSAIN ,  Marco ZANUSO ,  Yiwu TANG

IPC: H04L7/033 ,  H04L7/00 ,  H04W56/00

CPC classification number: H04L7/033 ,  H04L7/0033 ,  H04W56/0035

Abstract: Aspects described herein include devices and methods for phase tracking and correction using sampling. One aspect includes a wireless communication apparatus having an analog 1-bit sampler configured to sample a phase locked loop (PLL) output signal using a PLL reference clock to generate 1-bit samples and a digital phase computation and control circuit configured to receive the 1-bit samples from the analog 1-bit sampler and apply phase corrections to the PLL based on a phase error derived from the 1-bit samples.

公开(公告)号：US20200177126A1

公开(公告)日：2020-06-04

申请号：US16697801

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Gang LIU ,  Mohammad FARAZIAN ,  Wu-Hsin CHEN ,  Razak HOSSAIN

IPC: H03B5/12

Abstract: Certain aspects provide a circuit for generating an oscillating signal. The circuit generally includes a voltage-controlled oscillator (VCO) having cross-coupled transistors, a first capacitive element and a second capacitive element coupled to the cross-coupled transistors, and a first inductive element and a second inductive element coupled to the cross-coupled transistors. First terminals of the first inductive element and the second inductive element are coupled to first terminals of the first capacitive element and the second capacitive element, respectively. The circuit also includes a control circuit having an output coupled to a supply voltage node at second terminals of the first inductive element and the second inductive element, and a feedback path coupled between the VCO and an input of the control circuit.