Design of voltage operational transconductance amplifier with 0.5 V supply voltage by combining miller and feed-forward compensation methods
Design of voltage operational transconductance amplifier with 0.5 V supply voltage by combining miller and feed-forward compensation methods
fatemeh chahshouri1 mohammad chahshouri2 mahya khorramshahi3
1) 1. School of Physics, College of Science, University of Tehran, Tehran, Iran,
2) 2. Department of Electrical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran,
3) 3. School of Physics, College of Science, University of Tehran, Tehran, Iran,
محل انتشار :
چهارمین کنگره بین المللی مهندسی، تکنولوژی و علوم کاربردی - نیوزلند(etas2019.com)
Abstract :
Low voltage operational transconductance amplifier (OTA) using cross-forward common-mode cancellation has been designed. Self-cascode transistors pairs are used to attain gaining enhancement. The OTA configuration biased on sub-threshold region to work by low voltage power supply has been proposed. To increase bandwidth and speed of the circuit, this OTA configuration combines innovative miller compensation method with feed-forward for phase compensation. OTA is designed and simulated in 180nm CMOS process technology in 0.5 V power supply and 200×60µm chip area. The power consumption of the circuit is 500 μW. The OTA has a simulated 73.6-dB DC gain, a 92-MHz gain-bandwidth, and a 47° phase margin for a load capacitor of 20 pF.
Keywords :
OTA, low voltage, self-cascode, sub-threshold, feed-forward compensation