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1. IN201947024992 - CLOCK DATA RECOVERY WITH NON-UNIFORM CLOCK TRACKING

Office
India
Application Number 201947024992
Application Date 24.06.2019
Publication Number 201947024992
Publication Date 19.07.2019
Publication Kind A
IPC
H04L 7/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
7Arrangements for synchronising receiver with transmitter
Applicants QUALCOMM INCORPORATED
Inventors SONG, Yu
ZHU, Zhi
LI, Miao
SUN, Li
SONG, Deqiang
CHANG, Chia Heng
Priority Data 15422050 01.02.2017 US
Title
(EN) CLOCK DATA RECOVERY WITH NON-UNIFORM CLOCK TRACKING
Abstract
(EN) Systems and methods for adjusting a phase step size of a clock data recover (CDR) circuit are described according to aspects of the present disclosure. In certain aspects a method for adjusting a phase step size of a CDR circuit includes sensing a frequency offset of the CDR circuit and adjusting the phase step size of the CDR circuit based on the sensed frequency offset. The frequency offset may be sensed by sensing a signal level on an integration path of a loop filter of the CDR circuit. The phase step size of the CDR circuit may be adjusted by switching the CDR circuit between a first phase step size and a second phase step size using a modulator (e.g. a sigma-delta modulator).