Title :
Low-power class-AB CMOS OTA with high slew-rate
Author :
Kim, Ah-Reum ; Kim, Hyoung-Rae ; Park, Yoon-Suk ; Choi, Yoon-Kyung ; Kong, Bai-Sun
Author_Institution :
Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea
Abstract :
In this paper, a novel low-power class-AB CMOS OTA with high slew-rate is presented. The proposed OTA is based on class-AB input stage using a novel adaptive-biasing. The proposed OTA designed using a standard 0.18-um CMOS technology indicates that rising and falling slew-rates of +4.92 V/¿S and -5.04 V/¿S with worst-case settling time of 2.1 ¿S, a voltage gain of 48.97 dB with GBW of 57.27 kHz and phase margin of 78.18 degree were achieved with 10-pF load capacitance and 1.8-V supply voltage. The proposed OTA consumes an overall current of 1.09 ¿A, and occupies a silicon area of 0.008 mm2.
Keywords :
CMOS analogue integrated circuits; low-power electronics; operational amplifiers; CMOS technology; adaptive-biasing; capacitance 10 pF; current 1.09 muA; gain 48.97 dB; high slew-rate; low-power class-AB CMOS OTA; operational transconductance amplifier; size 0.18 mum; time 2.1 mus; voltage 1.8 V; CMOS technology; Capacitance; Design engineering; Energy consumption; Equations; Feedback circuits; Silicon; Tail; Transconductance; Voltage; CMOS analog circuit; Class-AB OTA; adaptive biasing; low power; slew rate enhancement;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423790
