An Adaptive Analog Continuous time Cmos Biquadratic Filter

Abstract

This paper presents an analog filter based on Rauch biquadratic cell. The filter exploits an improved analog stage that makes linearity performance uniform over the entire pass-band frequency region. All feedback analog filters suffer from poor linearity when the input tones frequency is in close proximity to the closed-loop poles frequency, where loop-gain reduces. This often forces an overdesign with higher current (higher power consumption) and/or higher overdrive voltages (lower dynamic range) in order to meet the linearity specifications over the whole filter pass-band region. The hereby proposed Rauch scheme resolves such a binding issue without power increasing and having the same IIP3 at low and at high frequency (up to the filter closed-loop poles frequency). Hence the linearity performance is in first approximation independent on the input tones bandwidth. In order to validate the hereby proposed idea a 4th-order 25 MHz −3 dB bandwidth pseudo-differential filter has been designed and simulated in CMOS 28 nm technology. The prototype consumes 820 µW from 1 V supply voltage and has 15  and 13 dBm IIP3 at 5 and 6 and 20 and 21 MHz input tones, respectively.

References

  1. Baschirotto, A., D'Amico, S., & De Matteis, M. (2006). Advances on analog filters for telecommunications. In Advanced signal processing, circuits, and system design techniques for communications. IEEE.

  2. Foster, E. (1965). Active low-pass filter design. IEEE Transactions on Audio, AU-13(5), 104–111.

    Article  Google Scholar

  3. De Matteis, M., D'Amico, S., Baschirotto, A. (2006). Power-minimization design procedure for rauch biquadratic cells. Research in Microelectronics and Electronics Ph. D. (pp. 141–144).

  4. Harrison, J., et al. (2003). 500 MHz CMOS anti-alias filter using feed-forward op-amps with local common-mode feedback. In Solid-state circuits conference, 2003. Digest of technical papers. ISSCC (pp. 132–133, 483). San Francisco, CA.

  5. De Matteis, M., et al. (2009). A 0.55 V 60 dB-DR fourth-order analog baseband filter. IEEE Journal of Solid-State Circuits, 44(9), 2525–2534.

    Article  Google Scholar

  6. Amir-Aslanzadeh, H., et al. (2009). A 1-V 31 dBm IIP3, reconfigurable, continuously tunable, power-adjustable active-RC LPF. IEEE Journal of Solid-State Circuits, 44(2), 495–508.

    Article  Google Scholar

  7. Kousai, S., et al. (2007). A 19.7 MHz, fifth-order active-RC Chebyshev LPF for draft IEEE802.11n with automatic quality-factor tuning scheme. IEEE Journal of Solid-State Circuits, 42(11), 2326–2338.

    Article  Google Scholar

  8. Vasilopoulos, A., et al. (2006). A low-power wideband reconfigurable integrated active-RC filter with 73 dB SFDR. IEEE Journal of Solid-State Circuits, 41(9), 2326–2338.

    Article  Google Scholar

  9. Mobarak, M. (2010). Attenuation-predistortion linearization of CMOS OTA with digital correction of process variations in OTA-C filter. IEEE Journal of Solid-State Circuits, 45(2), 351–367.

    Article  Google Scholar

  10. Oskooei, M. S., et al. (2011). A CMOS 4.35-mW +22-dBm IIP3 continuously tunable channel select filter for WLAN/WiMAX receivers. IEEE Journal of Solid-State Circuits, 46(6), 1382–1392.

    Article  Google Scholar

  11. De Matteis, M., et al. (2015). A 33 MHz 70 dB-SNR super-source-follower-based low-pass analog filter. IEEE Journal of Solid-State Circuits, 50(7), 1516–1524.

    Article  Google Scholar

  12. De Matteis, M., Resta, F., Pipino, A., D'Amico, S., & Baschirotto, A. (2016). A 28.8-MHz 23-dBm-IIP3 3.2-mW Sallen–Key fourth-order filter with out-of-band zeros cancellation. IEEE Transactions on Circuits and Systems II: Express Briefs, 63(12), 1116–1120.

    Article  Google Scholar

  13. Sansen, W. (2006). Analog design essentials. In The Springer international series in engineering and computer science (Chapter 1, pp. 46–47).

  14. D'Amico, S., et al. (2014). A 7.65-mW 5-bit 90-nm 1-Gs/s folded interpolated ADC without calibration. IEEE Transactions on Instrumentation and Measurement, 63(2), 295–303.

    Article  Google Scholar

  15. Sansen, W. (1999). Distortion in elementary transistor circuits. IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 46(3), 315–325.

    Article  Google Scholar

Download references

Acknowledgement

This activity is within the ScalTech28 Project funded by Italian National Institute for Nuclear Physics (INFN).

Author information

Authors and Affiliations

Corresponding author

Correspondence to Marcello De Matteis.

About this article

Verify currency and authenticity via CrossMark

Cite this article

De Matteis, M. Continuous-time analog filter with passband constant IIP3 based on common-gate amplifier. Analog Integr Circ Sig Process 93, 99–106 (2017). https://doi.org/10.1007/s10470-017-1031-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI : https://doi.org/10.1007/s10470-017-1031-2

Keywords

  • Analog filters
  • Low-power
  • Linearity
  • CMOS
  • Low-voltage

dotsonsuallible.blogspot.com

Source: https://link.springer.com/article/10.1007/s10470-017-1031-2

0 Response to "An Adaptive Analog Continuous time Cmos Biquadratic Filter"

Enregistrer un commentaire

Iklan Atas Artikel

Iklan Tengah Artikel 1

Iklan Tengah Artikel 2

Iklan Bawah Artikel