Title:	130 nm CMOS Fully Differential SC Filter for Ultra-Low Voltage ∑-Δ Converter
Authors:	Maljar, David Arbet, Daniel Stopjakova, Viera
Citation:	2020 International Conference on Applied Electronics: Pilsen, 8th – 9h September 2020, Czech Republic.
Issue Date:	2020
Publisher:	Západočeská univerzita v Plzni
Document type:	conferenceObject konferenční příspěvek
URI:	http://hdl.handle.net/11025/39910
ISBN:	978-80-261-0891-7 (Print) 978-80-261-0892-4 (Online)
ISSN:	1803-7232 (Print) 1805-9597 (Online)
Keywords:	analogový design;velmi nízké napětí;integrátor spínaných kondenzátorů;Sigma-Delta ADC;CMOS
Keywords in different language:	analog design;ultra-low voltage;switched-capacitor integrator;Sigma-Delta ADC;CMOS
Abstract in different language:	In this paper design and function of thefully differential (FD) switched-capacitor (SC) integra-tor for ultra-low voltage Sigma-Delta analog to digitalconverter (Σ-∆ADC) are presented. The proposedintegrator was designed for differential input signal andapplicable as a main analog block of ultra-low voltageΣ-∆ADC in standard 130 nm CMOS technology.The main block of proposed integrator is operationaltransconductance amplifier (OTA) based on two-stageRail-to-Rail (RtR) FD operational amplifier (OPAMP)working in sub-threshold regime. The characteristicproperties of this circuit is non-standard OTA topology,using SC common-mode feedback (CMFB) circuit andusing switching T-gates. All of these subcircuits aresupplied by only 0.6 V with achieved gain 24.09 dB andcutoff frequency 165.95 kHz.
Rights:	© Západočeská univerzita v Plzni
Appears in Collections:	Applied Electronics 2020 Applied Electronics 2020

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