Title :
A 120nm CMOS Fully Differential Rail-to-Rail I/O Opamp with Highly Constant Signal Behavior
Author :
Yan, Weixun ; Zimmermann, Horst
Author_Institution :
Inst. of Electr. Meas. & Circuit Design, Vienna Univ. of Technol., Vienna
Abstract :
This paper proposes a fully differential opamp implemented in 120 nm digital CMOS technology, with rail-to-rail input common-mode range, realized by a novel approach of constant small- and large-signal behavior control. The small-signal response is improved to an extremely slim deviation of 2.4%. Also a new class-AB rail-to-rail output stage is designed, targeting at high drive capability down to 33Omega resistive load, high power transfer efficiency and linearity. A modified measurement circuitry for fully differential opamps is introduced as well.
Keywords :
CMOS digital integrated circuits; differential amplifiers; operational amplifiers; class-AB rail-to-rail output stage; digital CMOS technology; fully differential I/O opamp design; large-signal behavior; power transfer efficiency; rail-to-rail input common-mode range; size 120 nm; small-signal behavior; CMOS digital integrated circuits; CMOS process; CMOS technology; Electric variables measurement; Linearity; Power supplies; Rail to rail inputs; Rail to rail outputs; Transconductance; Voltage;
Conference_Titel :
SOC Conference, 2006 IEEE International
Conference_Location :
Taipei
Print_ISBN :
0-7803-9781-9
Electronic_ISBN :
0-7803-9782-7
DOI :
10.1109/SOCC.2006.283831
