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5.8 GHz PLL using High-Speed Ring Oscillator for WLAN  

Kim, Kyung-Mo (Memory Div., Samsung Electronics)
Choi, Jae-Hyung (Dept. of Electronics Engineering, Dongguk University)
Kim, Sam-Dong (Dept. of Electronics Engineering, Dongguk University)
Hwang, In-Seok (Dept. of Electronics Engineering, Dongguk University)
Publication Information
Abstract
This paper presents a 5.8 GHz PLL using high-speed ring oscillator for WLAN. The proposed ring oscillator has been designed using the negative skewed delay scheme and for differential mode operation. Therefore, the oscillator is insensitive to power-supply-injected noise, and it has the merit of low 1/f noise because tail current sources are not used. The output frequency ranges from 5.13 to 7.04 GHz with the control voltage varing from 0 to 1.8 V. The proposed PLL circuits have been designed, simulated, and proved using 0.18 um 1.8 V TSMC CMOS library. At the operation frequency of 5.8 GHz, the locking time is 2.5 us and the simulated power consumption is 59.9 mW.
Keywords
PLL; Ring Oscillator; Negative Skewed Delay Scheme;
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Times Cited By KSCI : 1  (Citation Analysis)
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