Low-voltage wide gm adjustable range highly linear BiCMOS OTA

LETTER

J. Ramírez-Angulo, Milind S. Sawant, A. J. López-Martín, R. G. Carvajal

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Keywords: analog CMOS integrated circuits, programmable current mirrors, Operational Transconductance Amplifiers (OTA)

JOURNAL FREE ACCESS

2005 Volume 2 Issue 4 Pages 127-132

DOI https://doi.org/10.1587/elex.2.127

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Abstract

A low distortion low-voltage BiCMOS OTA with wide g_m adjustment range and constant input range is presented. It is based on a highly linear voltage-to-current converter input stage merged with translinear loops that implement linear electronically programmable current mirrors. Experimental results are provided that confirm the characteristics of the proposed OTA with a single 1.7V supply, 1.2V input range, two decades gain adjustment range, and 0.3% THD.

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