Diseño de OTAs de baja transconductancia con rango lineal extendido y sus aplicaciones en señales EEG
DOI:
https://doi.org/10.31381/perfilesingenieria.v20i21.5967Keywords:
Amplifier, low transconductance, low power, low frequency, current mirrorsAbstract
In this work, the design of symmetric OTAs with low transconductance value (nA/V order) and their application in low frequency and low power is presented. For this aim, the series-parallel (S-P) mirrors was used, which divided the differential pair transconductance. With this technique, a 1 nA/V transconductor is reached. Techniques for extend the linear range (hundreds milivolts) of the differential pair will presented too. The Advanced Compact MOSFET Model ACM was used in the design process.
These symmetric OTAs designed will be used in active filters with low central frequency, for biomedical applications (EEG signals). The capacitors of this filters are in the picofaradads order, and are off chip. These OTAs and filters were designed in 0.8 um standard technology.
These techniques that we will present will be validated through simulation
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References
Veeravalli, Sanchez-Sinencio y S. Martinez, «Different operational transconductance Amplifier topologies for obtaining Very Small Transconductances,» de ISCAS 2000-IEEE International Symposium on Circuits and Systems, May 28-31, 2000, Geneva, Switzerland, 2000.
R. Campana y M. Marquez, «Diseño de OTAs de Bajo GM y su aplicación en Baja Frecuencia y Microconsumo,» de IBERCHIP, March 14-16, Lima, Peru, 2007.
A. Arnaud y C. Galup-Montoro, «Pico A/V Range CMOS Transconductors Using Series-Parallel Current Division,» Electronics Letters, vol. 39, nº 18, pp. 1295-1296, 2003.
A. Cunha, M. Schneider y C. Galup-Montoro, «An MOS Transistor Model for Analog Circuit Design,» IEEE Journal of Solid-State Circuits, vol. 33, nº 10, pp. 1510-1519, Octuber 1998.
F. Krummenacher y N. Joehl, «A 4-Mhz CMOS continuous time filter with on-chip automatic tuning,» IEEE Journal of Solid-State Circuits, vol. 23, nº 3, p. 750–758, 1988.
A. Arnaud, R. Fiorelli y C. Galup-Montoro, «On the Design of Very Small Transconductance OTAs with Reduced Input Offset,» de SBCCI´05, Florianópolis-Brasil, 2005.
C. Galup-Montoro, M. Schneider y R. Loss, «Series-Parallel Association of FETs for High Gain and High Frequency Applications,» IEEE Journal of Solid-State Circuits, vol. 29, nº 9, pp. 1094-1101, 1994.
G. Düzenli, Y. Kiliç, H. Kuntman y A. Ataman, «On the Design of Low Frequency Filters Using CMOS OTAs Operating in the Subtreshold Region,» Microelectronics Journal, vol. 30, nº 1, pp. 45-54, 1999.
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