2008•Unpublished venueRequires access

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

Milad Razzaghpour, Abbas Golmakani

Abstract

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.

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Available abstract

Key concepts: Gain–bandwidth product, Operational transconductance amplifier, Transconductance, Capacitor, Open-loop gain, Electrical engineering, Bandwidth (computing), Operational amplifier