TY - JOUR
T1 - An ultralow-power low-voltage class-AB fully differential opamp for long-life autonomous portable equipment
AU - Valero, María Rodanas
AU - Celma, S.
AU - Medrano, N.
AU - Calvo, B.
PY - 2012/9/10
Y1 - 2012/9/10
N2 - This brief presents an ultralow-power class-AB operational amplifier (OpAmp) designed in a low-cost 0.18-μm CMOS technology. The proposed circuit uses transistors biased in the subthreshold region for low-voltage low-power operation. For a 0.8-V single supply, this OpAmp has 51-dB open-loop gain, 57-kHz unity-gain frequency, 60° phase margin, and 65-dB common-mode rejection ratio for 8-pF loads with a power consumption of only 1.2 μW. Experimental results illustrate performances such as a 0.14-Vμs slew rate and a 750-mV linear output swing, demonstrating its correct functionality.
AB - This brief presents an ultralow-power class-AB operational amplifier (OpAmp) designed in a low-cost 0.18-μm CMOS technology. The proposed circuit uses transistors biased in the subthreshold region for low-voltage low-power operation. For a 0.8-V single supply, this OpAmp has 51-dB open-loop gain, 57-kHz unity-gain frequency, 60° phase margin, and 65-dB common-mode rejection ratio for 8-pF loads with a power consumption of only 1.2 μW. Experimental results illustrate performances such as a 0.14-Vμs slew rate and a 750-mV linear output swing, demonstrating its correct functionality.
KW - CMOS analog integrated circuits
KW - low-power design
KW - operational amplifiers (OpAmps)
UR - http://www.scopus.com/inward/record.url?scp=84867871412&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2012.2213361
DO - 10.1109/TCSII.2012.2213361
M3 - Article (Academic Journal)
AN - SCOPUS:84867871412
SN - 1549-7747
VL - 59
SP - 643
EP - 647
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 10
M1 - 6294513
ER -