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Circuits, Systems, and Signal Processing

, Volume 31, Issue 1, pp 51–60 | Cite as

High Input Impedance NMOS-based Phase Shifter with Minimum Number of Passive Elements

  • Shahram MinaeiEmail author
  • Erkan Yuce
Article

Abstract

In this paper, a new voltage-mode (VM) first-order phase shifter (all-pass filter) employing only four NMOS transistors and minimum number of passive elements (i.e. one resistor and one capacitor) is proposed. The proposed VM phase shifter has high input impedance and does not require passive element matching constraints. Moreover, since only two NMOS transistors are stacked between positive and negative supply voltages, the proposed circuit is suitable for low-voltage operation. Electronic tunability can be provided easily by replacing the employed resistor with an NMOS transistor operating in triode region. Simulation results based on 0.18 μm TSMC CMOS parameters with ±0.9 V supply voltages are given to demonstrate the performance of the proposed phase shifter.

Keywords

Phase shifter All-pass filter NMOS transistor Tunability 

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References

  1. 1.
    H.P. Chen, K.H. Wu, Grounded-capacitor first-order filter using minimum components. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. E89-A(12), 3730–3731 (2006) CrossRefGoogle Scholar
  2. 2.
    D.J. Comer, High-frequency narrow-band active filters. IEEE Trans. Circuits Syst. CAS-33(8), 838–840 (1986) CrossRefGoogle Scholar
  3. 3.
    A. Fabre, O. Saaid, F. Wiest, C. Boucheron, High frequency applications based on a new current controlled conveyor. IEEE Trans. Circuits Syst. I, Fundam. Theory Appl. 43, 82–91 (1996) CrossRefGoogle Scholar
  4. 4.
    S. Maheshwari, High input impedance VM-APSs with grounded passive elements. IET Circuits Devices Syst. 1(1), 72–78 (2007) MathSciNetCrossRefGoogle Scholar
  5. 5.
    S. Maheshwari, A canonical voltage-controlled VM-APS with a grounded capacitor. Circuits Syst. Signal Process. 27, 123–132 (2008) CrossRefGoogle Scholar
  6. 6.
    B.J. Maundy, P. Aronhime, A novel CMOS first order all pass filter. Int. J. Electron. 89(9), 739–743 (2002) CrossRefGoogle Scholar
  7. 7.
    B. Metin, O. Cicekoglu, Tunable all-pass filter with a single inverting voltage buffer, in Proc. Ph.D. Research in Microelectronics and Electronics (PRIME’08), Istanbul (2008), pp. 261–263 CrossRefGoogle Scholar
  8. 8.
    B. Metin, O. Cicekoglu, Component reduced all-pass filter with a grounded capacitor and high impedance input. Int. J. Electron. 96(5), 445–455 (2009) CrossRefGoogle Scholar
  9. 9.
    B. Metin, K. Pal, Cascadable allpass filter with a single DO-CCII and a grounded capacitor. Analog Integr. Circuits Signal Process. 61(3), 259–263 (2009) CrossRefGoogle Scholar
  10. 10.
    S. Olmez, U. Cam, A novel square-root domain realization of first order all-pass filter. Turk. J. Electr. Eng. Comput. Sci. 18(1), 141–146 (2010) Google Scholar
  11. 11.
    B. Razavi, Fundamentals of Microelectronics, 1st edn. (Wiley, New York, 2008) Google Scholar
  12. 12.
    A. Toker, S. Ozoguz, Tunable allpass filter for low voltage operation. Electron. Lett. 39(2), 175–176 (2003) CrossRefGoogle Scholar
  13. 13.
    E. Yuce, A novel CMOS-based voltage-mode first-order phase shifter employing a grounded capacitor. Circuits Syst. Signal Process. 29(2), 235–245 (2010) zbMATHCrossRefGoogle Scholar
  14. 14.
    E. Yuce, S. Minaei, A novel phase shifter using two NMOS transistors and passive elements. Analog Integr. Circuits Signal Process. 62(1), 77–81 (2010) CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Electronics and Communications EngineeringDogus UniversityIstanbulTurkey
  2. 2.Department of Electrical and Electronics EngineeringPamukkale UniversityKinikli-DenizliTurkey

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