Low phase noise, 18 kHz frequency tuning step, 5 GHz, 15 bit digitally controlled oscillator in 0.18 æm CMOS technology

Ramesh K. Pokharel; Kenta Uchida; Abhishek Tomar; Haruichi Kanaya; Keiji Yoshida

doi:10.1587/transele.E93.C.1007

Low phase noise, 18 kHz frequency tuning step, 5 GHz, 15 bit digitally controlled oscillator in 0.18 æm CMOS technology

Ramesh K. Pokharel, Kenta Uchida, Abhishek Tomar, Haruichi Kanaya, Keiji Yoshida

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A method to realize the fine frequency-tuning steps using tiny capacitors instead of Metal-Insulator-Metal (MIM) capacitors is proposed for a digitally controlled oscillator (DCO). The tiny capacitors are realized by the coplanar transmission lines which are arranged unsym-metrical in a 6 metal layers (M6) foundry of 0.18 μm CMOS technology. These transmission line based capacitors are designed by using electromagnetic field simulator, and co-designed by using SPICE simulator. Finally, these capacitors are employed to design 15 bit DCO and fabricated the proposed DCO in 0.18 μm CMOS technology, and tested. The measured phase noise of DCO was -118.3 dBc/Hz (@1 MHz offset frequency), and the oscillating frequency tuned from 4.86 GHz to 5.36 GHz in the minimum frequency-tuning step of 18 kHz.

Original language	English
Pages (from-to)	1007-1013
Number of pages	7
Journal	IEICE Transactions on Electronics
Volume	E93-C
Issue number	7
DOIs	https://doi.org/10.1587/transele.E93.C.1007
Publication status	Published - Jul 2010

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1587/transele.E93.C.1007

Cite this

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abstract = "A method to realize the fine frequency-tuning steps using tiny capacitors instead of Metal-Insulator-Metal (MIM) capacitors is proposed for a digitally controlled oscillator (DCO). The tiny capacitors are realized by the coplanar transmission lines which are arranged unsym-metrical in a 6 metal layers (M6) foundry of 0.18 μm CMOS technology. These transmission line based capacitors are designed by using electromagnetic field simulator, and co-designed by using SPICE simulator. Finally, these capacitors are employed to design 15 bit DCO and fabricated the proposed DCO in 0.18 μm CMOS technology, and tested. The measured phase noise of DCO was -118.3 dBc/Hz (@1 MHz offset frequency), and the oscillating frequency tuned from 4.86 GHz to 5.36 GHz in the minimum frequency-tuning step of 18 kHz.",

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AU - Tomar, Abhishek

AU - Kanaya, Haruichi

AU - Yoshida, Keiji

PY - 2010/7

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Low phase noise, 18 kHz frequency tuning step, 5 GHz, 15 bit digitally controlled oscillator in 0.18 æm CMOS technology

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All Science Journal Classification (ASJC) codes

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