Title :
Low-voltage operational amplifier in 0.12 μm digital CMOS technology
Author :
Schlögl, F. ; Zimmermann, H.
Author_Institution :
Inst. for Electr. Meas.s & Circuit Design, Vienna Univ. of Technol., Austria
Abstract :
A fully differential low-power operational amplifier in 0.12 μm digital CMOS technology achieving a differential gain of 80 dB is presented. A transit frequency of 20.5 MHz at ±0.7 V supply and with a load of 10 pF has been measured. Owing to an innovative bulk controller for the input transistors, the common-mode input range is larger than ±0.2 V. The operational amplifier can be used down to a supply voltage of ±0.4 V with a differential gain of 63.5 dB.
Keywords :
CMOS digital integrated circuits; analogue integrated circuits; differential amplifiers; low-power electronics; mixed analogue-digital integrated circuits; operational amplifiers; 0.12 micron; 10 pF; 20.5 MHz; 63.5 dB; 80 dB; bulk controller; common-mode input range; differential gain; differential operational amplifier; digital CMOS technology; input transistors; low-voltage operational amplifier; transit frequency;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings -
DOI :
10.1049/ip-cds:20040413
