Analysis and Design of Superharmonic Injection-Locked Multipath Ring Oscillators

Author

Hafez, Amr Amin ; Chih-Kong Ken Yang

Author_Institution

Electr. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA

Volume

60

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

1712

Lastpage

1725

Abstract

Frequency dividers can be modeled as superharmonic injection-locked oscillators. We propose a general model for ring-oscillator based dividers. Theoretically, the maximum division frequency of a frequency divider can be decoupled from the number of phases at its output when multipath coupling of ring oscillators is used. Accurate expressions for the locking range are derived that are used to find the optimum structure to maximize the division frequency. The results of the model are incorporated into a design procedure that can rapidly explore various coupling and sizing of the multipath structure. A design of a divider chain for a 48-Gb/s serializing transmitter is used as a demonstration.

Keywords

frequency dividers; injection locked oscillators; bit rate 48 Gbit/s; design procedure; frequency divider; locking range; multipath coupling; multipath structure; ring-oscillator based divider; serializing transmitter; superharmonic injection-locked multipath ring oscillator; superharmonic injection-locked oscillator; Clocks; Frequency conversion; Inverters; Latches; Ring oscillators; Transconductance; Frequency dividers; PLL; injection locked; multipath ring oscillator; multiphase clock; oscillation modes;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2012.2230591

Filename

6420987