Review article

Evolution of digitally controlled oscillator

Jubayer Jalil orcid.org/0000-0001-9204-2790 ; Faculty of Engineering and Built Environment, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Mamun Bin Ibne Reaz orcid.org/0000-0002-0459-0365 ; Faculty of Engineering and Built Environment, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Savisha Mahalingam ; Faculty of Engineering and Built Environment, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Syarizal Bin Zainal Abidin ; Faculty of Engineering and Built Environment, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Tae Gyu Chang ; School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-ku, Seoul 156-756, South Korea

Abstract

Current trend of using digital or all-digital phase-locked loops (PLLs) in various communication devices introduces the usage of digitally controlled oscillator (DCO). This review paper discusses the evolution of DCOs in modern electronic devices as well as their performances in local oscillators. Even though the DCO implementation is preferable to its analog counterpart, improvements are still going on to get high performances in terms of power consumption, speed, chip area, frequency range, supply voltage, portability and resolution. This paper mainly describes the evolution of DCO, how it turns from a conventional VCO to DCO for deep-submicrometer CMOS process. The focus is to analyse and track the advances in DCO base on its performance level.

Keywords

All-Digital PLL (ADPLL); Complementary Metal Oxide Semiconductor (CMOS); Digitally Controlled Oscillator (DCO); Digital PLL (DPLL)

Hrčak ID:

126087

URI

https://hrcak.srce.hr/126087

Publication date:

15.8.2014.

Article data in other languages: croatian

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