National Academy Science Letters

, Volume 41, Issue 1, pp 47–52 | Cite as

Design of a Wide Band, Low-Noise Differential Voltage Controlled Ring Oscillator in 90 nm CMOS Process

  • Shabbir Majeed Chaudhry
  • Zain Shabbir
Short Communication


This paper presents a low noise, differential voltage controlled ring oscillator (VCRO) with a wide tuning range. A CMOS varactor based differential delay cell has also been proposed, which not only minimizes phase noise but reduces the power consumption and chip area of the VCRO, as well. The VCRO has been implemented in UMC 90 nm 1P-9M Cu with low-K SP, CMOS process technology. The frequency tuning range of the proposed VCRO is 852.8 MHz to 5.98 GHz and the controlling voltage range is 0–0.8 V. The phase noise observed was − 102.4 dBc/Hz at an offset of 1 MHz. The proposed VCRO consumes a power of 1.19 mW at a supply voltage of 1 V and occupies a chip area of 35 × 50 μm2.


Ring oscillator Phase noise Voltage controlled oscillator 90 nm CMOS 


  1. 1.
    Li J, Hasan SMR (2012) Pulse-biased low-power low-phase-noise UHF LC-QVCO for 866 MHz RFID front-end. IEEE Trans Microw Theory Tech 60(10):3120–3125ADSCrossRefGoogle Scholar
  2. 2.
    Kim J-M, Kim S, Lee I-Y, Han S-K, Lee S-G (2013) A low-noise four-stage voltage-controlled ring oscillator in deep-submicrometer CMOS technology. IEEE Trans Circuits Syst II Expr Briefs 60(2):71–75CrossRefGoogle Scholar
  3. 3.
    Choi Young-Shig (2013) A negative feedback looped voltage-controlled ring oscillator with frequency voltage converter. IEEE Trans Microw Theory Tech 61(9):3271–3276ADSCrossRefGoogle Scholar
  4. 4.
    Bako Niko, Baric Adrijan (2013) A low-power, temperature and supply voltage compensated current starved ring oscillator. Microelectron J 44(12):1154–1158CrossRefGoogle Scholar
  5. 5.
    Jalil Jubayer, Reaz Mamun Bin Ibne, Ali Mohd Alauddin Mohd (2013) CMOS differential ring oscillators. IEEE Microw Mag 14(5):97–109CrossRefGoogle Scholar
  6. 6.
    Hauspie D, Park Eun-Chul, Craninckx Jan (2007) Wideband VCO with simultaneous switching of frequency band, active core, and varactor size. IEEE J Solid-State Circuits 42(7):1472–1480CrossRefGoogle Scholar
  7. 7.
    Liu HQ, Goh WL, Siek L, Lim WM, Zhang Y-P (2009) A low-noise multi-GHz CMOS multiloop ring oscillator with coarse and fine frequency tuning. IEEE Trans Very Large Scale Integr Syst 17(4):571–577CrossRefGoogle Scholar
  8. 8.
    Lee W, Shim J, Jeong J (2013) Design of a three-stage ring-type voltage-controlled oscillator with a wide tuning range by controlling the current level in an embedded delay cell. Microelectron J 44(12):1328–1335CrossRefGoogle Scholar
  9. 9.
    Pankratz EJ, Sinencio ES (2012) Multiloop high power supply rejection quadrature ring oscillator. IEEE J Solid State Circuits 47(9):2033–2048CrossRefGoogle Scholar
  10. 10.
    Zhang C, Zhou J (2012) A 2.4 GHz low power low phase noise ring VCO. IEEE Int Conf Anti Count Secur Identif. Google Scholar
  11. 11.
    Maaita TA, Tahboub AH, Gharbieh KA (2013) A 10 GHz wideband VCO with low KVCO variation. Microelectron J 44(2):103–118CrossRefGoogle Scholar
  12. 12.
    Saad S, Mhiri M, Hammadi AB, Besbes K (2015) A 160 µW, ring digitally controlled oscillator for UHF/VHF nano-satellites broadcasting tuners in 90 nm CMOS process. IEEE Multi Conf Syst Signals Dev. Google Scholar
  13. 13.
    Rout PK, Acharya DP, Panda G (2014) A Multiobjective optimization based fast and robust design methodology for low power and low phase noise current starved VCO. IEEE Trans Semicond Manuf 21(1):43–50CrossRefGoogle Scholar
  14. 14.
    AbuGharbieh K, Abdelfattah M, Al-Maaita T, Tahboub A (2013) A wide tuning range 11.8 GHz ring oscillator VCO with temperature and process compensation. IEEE EUROCON. Google Scholar

Copyright information

© The National Academy of Sciences, India 2018

Authors and Affiliations

  1. 1.University of Engineering and TechnologyTaxilaPakistan

Personalised recommendations