Title :
An ultra-low-voltage ultra-low-power OTA with improved gain-bandwidth product
Author :
Razzaghpour, Milad ; Golmakani, Abbas
Author_Institution :
Electr. Eng. Fac., Sadjad Univ. Mashhad, Mashhad, Iran
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.
Keywords :
circuit feedback; differential amplifiers; low-power electronics; network topology; operational amplifiers; Miller capacitor feedback path; bulk-driven input differential pair; gain-bandwidth product; operational transconductance amplifier; power 1.02 muW; size 0.18 mum; ultra low-voltage ultra low-power OTA; voltage 0.5 V; weak inversion; Bandwidth; CMOS process; Capacitors; Circuits; Feedback; Frequency; Operational amplifiers; Power supplies; Resistors; Transconductance; Bulk-driven differential pair; Miller compensation; full swing; operational transconductance amplifier (OTA); right half-plane zero control; ultra-low-power; ultra-low-voltage;
Conference_Titel :
Microelectronics, 2008. ICM 2008. International Conference on
Conference_Location :
Sharjah
Print_ISBN :
978-1-4244-2369-9
Electronic_ISBN :
978-1-4244-2370-5
DOI :
10.1109/ICM.2008.5393821
