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A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices

Titelangaben

Mai, Timo ; Schmid, Konstantin ; Röber, Jürgen ; Hagelauer, Amelie ; Weigel, Robert:
A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices.
In: 24th IEEE International Conference on Electronics, Circuits and Systems. - Batumi, Georgia , 2017 . - S. 74-77
ISBN 9781538619117
DOI: https://doi.org/10.1109/ICECS.2017.8292081

Abstract

A fully differential CMOS operational amplifier is presented. It uses a new chopping technique that works without the use of switching transistors in the high gain path, resulting in high noise performance and low offset. It is designed in a low-cost 180 nm process with a 5V supply voltage. In critical places, such as the differential pair, 1.8V-devices are used, as they provide much better matching and noise performance, and at the same time have lower parasitics. They are protected from breakdown conditions by several circuit techniques. Some of them are described below. The operational amplifier is used in a differential programmable gain amplifier for processing signals of up to 50 kHz bandwith with a SINAD > 100 dB, making it suitable as a preamplifier for 18-Bit ADCs.

Weitere Angaben

Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Ja
Keywords: chopping; operational amplifier; gain boosting; 1/f-noise; offset; programmable gain amplifier;
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren > Lehrstuhl Kommunikationselektronik - Univ.-Prof. Dr.-Ing. Amélie Marietta Hagelauer
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Kommunikationselektronik
Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 22 Okt 2019 07:21
Letzte Änderung: 22 Okt 2019 07:21
URI: https://eref.uni-bayreuth.de/id/eprint/52539