1-V rail-to-rail operational amplifiers in standard CMOS technology

Citation
Jf. Duque-carrillo et al., 1-V rail-to-rail operational amplifiers in standard CMOS technology, IEEE J SOLI, 35(1), 2000, pp. 33-44
Citations number
20
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE JOURNAL OF SOLID-STATE CIRCUITS
ISSN journal
00189200 → ACNP
Volume
35
Issue
1
Year of publication
2000
Pages
33 - 44
Database
ISI
SICI code
0018-9200(200001)35:1<33:1ROAIS>2.0.ZU;2-I
Abstract
The constraints on the design of CMOS operational amplifiers with rail-to-r ail input range for extremely low supply voltage operation, are addressed. Two design approaches for amplifiers based on complementary input different ial pairs and a single input pair, respectively, are presented. The first r ealizes a feedforward action to accommodate the common-mode (CM) component of the input signals to the amplifier input range. The second approach perf orms a negative feedback action over the input CM signal. Two operational a mplifiers based on the proposed approaches have been designed for l-V total supply operation, and fabricated in a standard 1.2-mu m CMOS process. Expe rimental results are provided and the corresponding performances are discus sed and compared.