Title :
Free class AB–AB Miller opamp with high current enhancement
Author :
Roman-Loera, Alejandro ; Ramirez-Angulo, Jaime ; Lopez-Martin, Antonio ; Carvajal, R.G.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
A two-stage (Miller) operational amplifier (opamp) with both class AB input and output stages is introduced. It has a well-controlled quiescent current and generates dynamic output currents of up to a factor 45 times larger than the quiescent current. It uses very compact circuitry with small static power consumption in order to achieve class AB-AB operation and can operate with a low supply voltage. Experimental results of a test chip fabricated using 0.18 μm CMOS technology and simulations in 130, 90, 65 and 45 nm verify the proposed circuit.
Keywords :
CMOS analogue integrated circuits; operational amplifiers; CMOS technology; dynamic output quiescent current generation; free class AB-AB two-stage Miller op-amp; power consumption; size 0.18 mum; size 130 nm; size 45 nm; size 65 nm; size 90 nm;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.4064
