Analysis and Design of Wideband Injection-Locked Ring Oscillators With Multiple-Input Injection
- 27 August 2007
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 42 (9) , 1906-1915
- https://doi.org/10.1109/jssc.2007.903058
Abstract
In this paper, the locking range of the injection-locked ring oscillators is investigated. To improve the injection efficiency and the locking range for superharmonic frequency division, a multiple-injection technique is proposed. Using a 0.18-mum CMOS process, a wideband frequency divider based on a three-stage ring oscillator is implemented for demonstration. With a tunable free-running frequency, the fabricated circuit provides 2:1 and 4:1 frequency division with a single-ended input signal ranging from 13 to 25 and 30 to 45 GHz, respectively. Compared with the case of the single-ended injection, the locking range of the frequency divider almost doubles when multiple-input injection with optimum phases is utilized. The experimental results exhibit good agreement with the theoretical derivation and the circuit simulation.Keywords
This publication has 17 references indexed in Scilit:
- Injection-Locked Frequency Dividers based on Ring Oscillators with Optimum Injection for Wide Lock RangePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- A 16-to-18GHz 0.18-m Epi-CMOS Divide-by-3 Injection-Locked Frequency DividerPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- High-frequency CML clock dividers in 0.13-/spl mu/m CMOS operating up to 38 GHzIEEE Journal of Solid-State Circuits, 2005
- 55GHz CMOS frequency divider with 3.2GHz locking rangePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- A study of injection locking and pulling in oscillatorsIEEE Journal of Solid-State Circuits, 2004
- Analysis and design of injection-locked LC dividers for quadrature generationIEEE Journal of Solid-State Circuits, 2004
- A CMOS direct injection-locked oscillator topology as high-frequency low-power frequency dividerIEEE Journal of Solid-State Circuits, 2004
- A 40-GHz Frequency Divider in 0.18-$muhboxm$CMOS TechnologyIEEE Journal of Solid-State Circuits, 2004
- A unified model for injection-locked frequency dividersIEEE Journal of Solid-State Circuits, 2003
- A study of locking phenomena in oscillatorsProceedings of the IEEE, 1973