A Rigorous Analysis of a Phase-Locked Oscillator Under Injection

Author

Li, Chien-Jung ; Hsiao, Chieh-Hsun ; Wang, Fu-Kang ; Horng, Tzyy-Sheng ; Peng, Kang-Chun

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

58

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

1391

Lastpage

1400

Abstract

This study presents injection-pulling effects on a local oscillator (LO) for wireless applications. A discrete-time analysis is provided to predict output spectra of the LO pulled by a sinusoidal and angle-modulated injection signal. A phase-locked loop synthesizer with an injection signal is analyzed in frequency domain to account for the inherent bandpass filtering on the injection signal. In addition, a phase noise model is developed by using the proposed frequency-domain approach to characterize the overall phase noise of a phase-locked oscillator under injection. Comparison between theoretical predictions and experimental results shows excellent agreement.

Keywords

discrete time systems; frequency-domain analysis; phase locked oscillators; phase noise; angle-modulated injection signal; bandpass filtering; discrete-time analysis; frequency-domain approach; local oscillator; phase noise model; phase-locked oscillator synthesizer; wireless applications; Injection locking; injection pulling; local oscillator (LO) pulling; phase-locked loop (PLL);

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2010.2042898

Filename

5440986