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An ultra-low-voltage ultra-low-power OTA with improved gain-bandwidth product

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2 Author(s)
Razzaghpour, M. ; Electr. Eng. Fac., Sadjad Univ. Mashhad, Mashhad, Iran ; Golmakani, Abbas

A 0.5-V ultra-low-power improved operational transconductance amplifier (OTA) using the transistors operate in weak inversion is presented in this paper. The proposed topology based on a bulk-driven input differential pair employed a gain-stage in the Miller capacitor feedback path to improve the ¿pole-splitting¿ effect. Simulations in a standard 0.18 ¿m CMOS process resulted on rail-to-rail input and output swings, considerable enhancement in unity-gain bandwidth and also the DC gain with the power consumption of only 1.02 ¿W.

Published in:

Microelectronics, 2008. ICM 2008. International Conference on

Date of Conference:

14-17 Dec. 2008