A 0.079 mm2 2.1-to-4.2 GHz ring-VCO employing programmable current topology

Awais, Muhammad and Ramiah, Harikrishnan and Lim, Chee Cheow and Chuah, Joon Huang (2018) A 0.079 mm2 2.1-to-4.2 GHz ring-VCO employing programmable current topology. Microelectronics International, 35 (2). pp. 85-91. ISSN 1356-5362

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Official URL: https://doi.org/10.1108/MI-02-2017-0003

Abstract

Purpose: The purpose of this work in designing a wideband ring voltage-controlled oscillator (VCO) based on programmable current topology. It occupies a very tiny area yet achieving a good phase noise performance, which is suitable to be implemented in cost-effective and wideband frequency synthesizers. Design/methodology/approach: The tuning range and gain are improved by dividing the VCO tuning curve into multiple curves controlled by programmable current sources without introducing additional parasitic capacitance. Findings: Fabricated in 130-nm standard complementary metal oxide semiconductor technology and occupying an area of 0.079 mm2, the VCO is tunable from 2.05 to 4.19 GHz, with a tuning percentage of 68.5 per cent. The VCO measures a phase noise performance of −96.7 dBc/Hz at an offset of 1 MHz from a 4.19 GHz carrier while consuming an average current of 6.5 mA, achieving figure of merit (FoM) and FoMT of −158.9 and −175.6 dBc/Hz, respectively. Originality/value: The proposed design uses programmable current topology without introducing parasitic capacitance, hence achieving wideband operation. It also occupies a tiny area and achieves a good phase noise performance.

Item Type: Article
Uncontrolled Keywords: Phase-locked loops (PLL); Programmable currents; Ring oscillators; Voltage-controlled oscillator (VCO); Wideband
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 19 Sep 2019 06:13
Last Modified: 19 Sep 2019 06:13
URI: http://eprints.um.edu.my/id/eprint/22426

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