A wide-band multipath CMOS OTA for high speed applications

Ali Vatanjou; Z D Koozehkanani; Jafar Sobhi; Farhad Nobakht Daghdaghan

doi:10.1587/elex.8.449

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A wide-band multipath CMOS OTA for high speed applications

Ali Vatanjou, Z D Koozehkanani, Jafar Sobhi, Farhad Nobakht Daghdaghan

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Keywords: OTA (Operational Transconductance Amplifier), DC gain, Unity Gain Bandwidth (UGBW)

JOURNAL FREE ACCESS

2011 Volume 8 Issue 7 Pages 449-453

DOI https://doi.org/10.1587/elex.8.449

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Abstract

A fast settling multipath CMOS OTA for high speed switched capacitor applications is presented here. With the basic topology similar to folded-cascode, bandwidth and DC gain of the OTA are enhanced by adding extra paths for signal from input to output. Designed circuit is simulated with HSPICE using level 49 parameters (BSIM 3v3) in 0.35um standard CMOS technology. The DC gain achieved is 56.7db and the Unity Gain Bandwidth (UGB) obtained is 1.15GHz.

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