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A Comparative Study of Noise Behavior in Single-Opamp Resonators in Delta-Sigma Modulators | IEEE Conference Publication | IEEE Xplore

A Comparative Study of Noise Behavior in Single-Opamp Resonators in Delta-Sigma Modulators


Abstract:

The approach of reducing the number of opamps in the loop filter of a delta-sigma modulator (DSM) using single-opamp resonators (SORs) has been introduced in many state-o...Show More

Abstract:

The approach of reducing the number of opamps in the loop filter of a delta-sigma modulator (DSM) using single-opamp resonators (SORs) has been introduced in many state-of-the-art (SoA) designs. The intention of this approach is to increase the power efficiency and decrease the circuit complexity of the design. Various SOR architectures with different RC combinations have been introduced in different designs. Even though some of those SOR based DSMs showed very good power efficiency, it remains an open question if the approach generally yields improved power efficiency or require a single opamp with much higher requirements compared to the conventional multi-opamp approach. Additionally, it is also not comparatively shown whether the requirements and the behavior of each SOR architecture is similar or significantly differs when compared to each other. This work compares the noise behavior of different SOR architectures introduced in the literature on analysis as well as simulation level. This is an important aspect in the design process, where the noise requirements commonly determines the required power consumption. It is shown that the noise behaviour of SOR significantly differs.
Date of Conference: 28 November 2021 - 01 December 2021
Date Added to IEEE Xplore: 10 January 2022
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Conference Location: Dubai, United Arab Emirates

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