A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices
Mai T, Schmid K, Hagelauer AM, Weigel R, Röber J (2017)
Publication Language: English
Publication Status: Published
Publication Type: Conference contribution, Original article
Future Publication Type: Conference contribution
Publication year: 2017
Pages Range: 74-77
Event location: Batumi
DOI: 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.
Authors with CRIS profile
Timo Mai
Lehrstuhl für Technische Elektronik
Amelie Marietta Hagelauer
Lehrstuhl für Technische Elektronik
Robert Weigel
Lehrstuhl für Technische Elektronik
Involved external institutions
Germany (DE)How to cite
APA:
Mai, T., Schmid, K., Hagelauer, A.M., Weigel, R., & Röber, J. (2017). A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices. In Proceedings of the 24th IEEE International Conference on Electronics, Circuits and Systems (pp. 74-77). Batumi, GE.
MLA:
Mai, Timo, et al. "A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices." Proceedings of the 24th IEEE International Conference on Electronics, Circuits and Systems, Batumi 2017. 74-77.
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