Systematic Design For Multistage Feed-forward Op-amp For High-Speed Continuous-Time ∑Δ ADCs

This paper presents a systematic design methodology for multi-stage feed-forward op-amps used in the active filters of continuous time \Sigma\triangle ADC. This methodology can provide the specifications of each stage in the op-amp (from 2 stages to 4 stages) based on the required ADC specifications...

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Bibliographic Details
Published inIEEE International Symposium on Circuits and Systems proceedings pp. 3219 - 3223
Main Authors Saif, Marco A., Sayed, Alhassan, Vasilevski, Michel, Dessouky, Mohamed, Aboushady, Hassan
Format Conference Proceeding
LanguageEnglish
Published IEEE 28.05.2022
Subjects
Active Filters
Circuits and systems
Continuous-time Sigma Delta ADC
Design methodology
High speed
Integrated circuit modeling
Multistage Feed-forward Op-amp
Sigma-delta modulation
Systematic Design
Systematics
Transfer functions
Transistors
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Summary:This paper presents a systematic design methodology for multi-stage feed-forward op-amps used in the active filters of continuous time \Sigma\triangle ADC. This methodology can provide the specifications of each stage in the op-amp (from 2 stages to 4 stages) based on the required ADC specifications and can provide an estimate of the Signal to Noise Ratio (SNR) taking into consideration the effect of the transfer function of the opamp. This method is then validated on a Lowpass and Bandpass \Sigma\triangle ADCs.
ISSN:2158-1525
DOI:10.1109/ISCAS48785.2022.9937213