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SETSCI - Volume 5(2) (2022)
ISAS-WINTER-2022 - 6th International Symposium on Innovative Approaches in Smart Technologies, Online, Turkey, Dec 08, 2022

Pink Noise Generation from White Noise using Current Mode Analog Building Blocks
Atilla Uygur1*
1Gebze Technical University, Kocaeli, Turkey
* Corresponding author: auygur@gtu.edu.tr
Published Date: 2022-12-22   |   Page (s): 62-65   |    105     4
https://doi.org/10.36287/setsci.5.2.014
ABSTRACT Pink noise, which has a power spectral density that is inversely proportional to the frequency, is widely used for acoustic applications such as for testing audio equipment. Its generation from white noise requires such a system transfer function that it is not directly realizable in the analog domain, and it is necessary to use an approximation for the frequency of interest. In this study, it is generated from white noise using a fourth-order filter transfer function. The presented circuit is different from the conventional voltage mode pink noise generators in the literature. It uses operational transconductance amplifiers (OTAs) as active building blocks  for the implementation and operates in the current mode. Using  transconductances for filter matching conditions enables to design circuits that do not require large capacitance and resistance values, and this is generally the preferred case when integrated circuit applications are considered.  The active realization in this paper is verified via SPICE simulations. The simulations agree well with the theory, and it can be claimed that adopting current mode approach to analog pink noise generators, especially when integrated circuit applications are regarded, The OTA circuit is a feasible alternative to conventional ones employing operational amplifiers.
KEYWORDS Pink noise, analog filters, approximation, signal processing, current mode
REFERENCES [1] B. Razavi, Design of Analog CMOS Integrated Circuits, McGraw Hill International Edition, 2001.

[2] K. Ohmori and S. Amakawa, “Direct white noise characterization of short-channel MOSFETs” IEEE Transactions on Electron Devices, vol. 68, no. 4, pp. 1478–1482, Apr. 2021.

[3] M. J. Deen and O. Marinov, “Noise in advanced electronic devices and circuits”, AIP Conference Proceedings, vol. 780, no. 3, pp. 3–12, Aug. 2005.

[4] D. Tokic and D. Jurisic, “High precision fractional-order integrator for generating pink noise from white noise”, in MIPRO 2022, 45th Jubilee International Convention on Information, Communication and Electronic Technology: Microelectronics, Electronics and Electronic Technology Meeting, 2022, paper 12.

[5] A. L. Dalcastagne and S. N. Filho, “On the analog generation of pink noise from white noise”, in Proc. ISCAS 2005, IEEE International Symposium on Circuits and Systems, 2005, no. 4, pp. 1944–1947.

[6] Y. Sun “Synthesis of leap-frog multiple-loop feedback OTA-C filters”, IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 53, no.9, pp. 961–965, Sep. 2006.

[7] Y. Sun, X. Zhu, and J. Moritz, “Explicit design formulas for current-mode leap-frog OTA-C filters and 300 MHz CMOS seventh-order linear phase filter” International Journal of Circuit Theory and Applications vol. 36, pp. 367–382, Nov. 2008.


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