Generic placeholder image

Recent Advances in Electrical & Electronic Engineering

Editor-in-Chief

ISSN (Print): 2352-0965
ISSN (Online): 2352-0973

Research Article

Low Noise and Low Distortion Telescopic OTA for Biomedical Signal Processing

Author(s): Zuber M. Patel*

Volume 12, Issue 6, 2019

Page: [507 - 512] Pages: 6

DOI: 10.2174/2352096511666180705115436

Price: $65

Abstract

Background: This paper presents a low noise and low distortion telescopic Operational Trans-conductance Amplifier (OTA) that is suited to biomedical signal processing. In our proposal, source degeneration using CMOS transmission gate is introduced in telescopic OTA to realize current- voltage negative feedback. The negative feedback degenerates Gm, reduces flicker noise and reduces distortion.

Methods: The circuit is simulated by using TSMC 90nm CMOS process technology with 1.8V supply voltage. We obtained promising simulation results that show THD less than -90dB and flicker noise 60 nV at 4kHz corner frequency.

Results: The frequency response plot reveals that our circuit offers a voltage gain of 63dB with negative feedback and achieves a phase margin of about 70 degrees. Thus, this topology is a feasible solution for low noise and low distortion biomedical signal amplifier circuits.

Conclusion: A highly linear and low noise telescopic OTA topology was proposed in this paper. A simple but efficient technique of source degeneration is used with negative feedback to achieve low distortion and low noise.

Keywords: Low distortion, source degeneration, flicker noise, telescopic OTA, THD, noise and nonlinearity.

Graphical Abstract
[1]
Texas Instruments. OPA167x Low-Distortion Audio Opamp. Available from:, http://www.ti.com/lit/ds/symlink/opa1678.pdf
[2]
M. Akbari, and O. Hashemipour, "Design and analysis of folded cascode OTAs using Gm/Id methodology based on flicker noise reduction", Springer J. Analog Integ. Circ. Sig. Process., vol. 83, no. 3, pp. 343-352, 2015.
[3]
J. Ou, and P.M. Ferreira, "“A gm/ID-based noise optimization for CMOS folded-cascode operational amplifier”, IEEE Transact. Circ. Syst.-", II: Express Brief., vol. 61, no. 10, pp. 783-787, 2014.
[4]
B. Saidulu, A. Manoharan, and K. Sundaram, "“Low noise low power CMOS telescopic-OTA for bio-medical application”, MDPI", J. Comput., vol. 5, no. 25, 2016.
[5]
K. Yaohui, L. Airong, and Y. Huazhong, "A highly linear lowvoltage source-degeneration transconductor based on unity-gain buffer", Tsinghua Sci. Technol., vol. 14, no. 6, pp. 698-702, 2009.
[6]
M. Akbari, S. Biabanifard, and S. Asadi, "Input referred noise reduction technique for transconductance amplifiers", Elec. Comput. Eng.: Inter. J. (ECIJ), 2015, vol. 4, no. 4, pp. 11-23, .
[7]
T. Yang, and J. Holleman, "An ultralow-power low-noise CMOS biopotential amplifier for neural recording", IEEE Trans. Circ. Syst.-II: Express Briefs, vol. 62, no. 10, 2015.
[8]
W. Wattanapanitch, M. Fee, and R. Sarpeshkar, "An energyefficient micropower neural recording amplifier", IEEE Trans. Biomed. Circuits Syst., vol. 1, no. 2, pp. 136-147, 2007.
[9]
C. Qian, J. Parramon, and E.S.- Sinencio, "Micropower low-noise neural recording front-end circuit for epileptic seizure detection", IEEE J. Solid-State Cir, vol. 46, no. 6, pp. 1392-1405, 2011.
[10]
S. Pennisi, "High-performance CMOS current feedback operational amplifier", In: Proceedings of IEEE International Symposium on Circuits and Systems, Kobe, Japan, 2005.
[11]
J. Holleman, and B. Otis, "A sub-microwatt low-noise amplifier for neural recording", In: Proceedings of the 29th Annual International Conference of the IEEE EMBS, Lyon, France, 2007.
[12]
A.B. Rezaeii, S. Mahdavi, K. Dadashi, and T. Moradi, "Novel feedback architecture in folded cascode amplifier for high-linearity high-resolution applications qualified for different corners", In: 1st International Conference on New Research Achievements in Electrical and Computer Engineering, 2016.
[13]
X. Chen, and J. Xing, "A compact output stage for low-power low distortion amplifier with diode negative feedback", In: Proceedings of IEEE International Conference on Anti-Counterfeiting Security and Identification in Communication (ASID), China, 2010.
[14]
B. Razavi, "Design of Analog CMOS Integrated Circuits", Tata McGraw-Hill Edition, 2002,
[15]
K. Gulati, and H.S. Lee, "A high-swing CMOS telescopic operational amplifier”, IEEEJ. Solid-State Cir, vol. 33, no. 12, 1998.
[16]
K. Abdelhalim, and R. Genov, "Compact chopper-stabilized neural amplifier with low-distortion high-pass filter in 0.13um CMOS", In: Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS), Seoul, South Korea, 2012.
[17]
User Guide. HSPICE Integration to Cadence Virtuoso Analgo Design Environment. Synposys, Version E-2010.12, Dec. 2010,

Rights & Permissions Print Export Cite as
© 2024 Bentham Science Publishers | Privacy Policy