A 1.2 V micropower CMOS op amp with floating-gate input transistors

Author

Raisanen-Ruotsalainen, Elvi ; Lasanen, Kimmo ; Kostamovaara, Juha

Author_Institution

Dept. of Electr. Eng., Oulu Univ., Finland

Volume

2

fYear

2000

fDate

2000

Firstpage

794

Abstract

A micropower 1.2 V op amp has been integrated in a 0.35 μm CMOS process. Floating-gate input transistors are used to increase the input common mode voltage range of the op amp. Measured dc gain of the op amp is 65 dB. With a 9 pF load unity gain bandwidth is 230 kHz and phase margin is 62°. Input referred noise is 0.5 μV/√(Hz) at 10 Hz and 0.15 μV/(Hz) at 10 kHz. Current consumption of the op amp is 4.3 μA and active area is 0.11 mm²

Keywords

CMOS analogue integrated circuits; integrated circuit noise; low-power electronics; operational amplifiers; 0.35 micron; 1.2 V; 10 Hz to 10 kHz; 230 kHz; 4.3 muA; 65 dB; 9 pF; DC gain; active area; current consumption; floating-gate input transistor; input common mode voltage range; input referred noise; micropower CMOS op amp; phase margin; unity gain bandwidth; Attenuation; Biomedical signal processing; CMOS process; Capacitors; Charge transfer; MOSFET circuits; Operational amplifiers; Parasitic capacitance; Threshold voltage; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on

Conference_Location

Lansing, MI

Print_ISBN

0-7803-6475-9

Type

conf

DOI

10.1109/MWSCAS.2000.952875

Filename

952875