Low-Phase-Noise, High Switching Speed Digitally Controlled Ring Oscillator in 0.18 μm Complementary Metal Oxide Semiconductor
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概要
- 論文の詳細を見る
In this paper a 14-bit digitally controlled oscillator (DCO) with operating frequency up to 4.2 GHz in 0.18 μm complementary metal oxide semiconductor (CMOS) technology is presented. To improve the phase noise, digital control is used that avoids continuous conduction of transistors and controlling transistors operate either in triode or cutoff region. The circuit uses multiple-loop feed forward architecture to increase the switching speed. The DCO has a wide frequency tuning range from 490 MHz to 4.2 GHz. The measured phase noise of the DCO is $-121.2$ dBc/Hz at a 4-MHz offset from a 3.86-GHz center frequency and power consumption of 48 mW. Due to the phase noise reduction and high switching speed, the DCO has a $-164.1$ dBc/Hz figure of merit (FOM) that is an improvement of $-4$ dBc/Hz over the previously published results in the same technology. The chip area is $300\times 300$ μm2.
- 2011-04-25
著者
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KANAYA Haruichi
Department of Applied Science, Faculty of Engineering, Kyushu University
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Yoshida Keiji
Department Of Electronics Graduate School Of Information Science And Electrical Eng. Kyushu Universi
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Pokharel Ramesh
E-JUST Center, Kyushu University, Fukuoka 819-0395, Japan
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Tomar Abhishek
Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Lingala Shashank
Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Yoshida Keiji
Department of Electronic Device Engineering, Graduate School of Information Science and Electrical Engineering, Kyushu University
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Yoshida Keiji
Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Kanaya Haruichi
Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Pokharel Ramesh
E-JUST center, Kyushu Univ.
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