Title :
A Low Phase-Noise Voltage-Controlled SAW Oscillator With Surface Transverse Wave Resonator for SONET Application
Author :
Lin, Jon-Hong ; Kao, Yao-Huang
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao-Tung Univ., Hsin-Chu
Abstract :
A surface transverse wave (STW) resonator-based oscillator was developed in response to SONET OC-48 application. To meet the low jitter objective, a high-Q STW resonator was designed and fabricated in this study. The residual phase-noise measurement techniques are used to evaluate the feedback oscillator components, such as the loop amplifier, STW resonator, and electronic phase shifter, which can play important roles in determining the oscillator´s output phase-noise spectrum. The oscillator´s white phase-noise floor is -170dBc/Hz for carrier-offset frequency greater than 1 MHz. The oscillator´s phase-noise level is -67dBc/Hz at a 100-Hz carrier offset. Both low close-in phase-noise and low white phase-noise floor makes the oscillator meet low jitter requirement. The electronic frequency tuning range exceeds plusmn200ppm. The oscillator provides 13.5 dBm of output power and consumes 65 mA from +5-V power supply
Keywords :
SONET; electric noise measurement; feedback oscillators; phase noise; surface acoustic wave oscillators; voltage-controlled oscillators; 100 Hz; 5 V; 65 mA; SONET OC-48; electronic frequency tuning; electronic phase shifter; feedback oscillator components; loop amplifier; phase-noise measurement; phase-noise spectrum; surface acoustic wave oscillator; surface transverse wave resonator; voltage-controlled oscillator; white phase-noise floor; Feedback loop; Frequency; Jitter; Low voltage; Measurement techniques; Output feedback; SONET; Surface acoustic waves; Surface waves; Voltage-controlled oscillators; Phase noise; SONET; surface acoustic wave (SAW); voltage-controlled oscillators (VCOs);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.888575
