Track-and-hold (T&H) circuits are used in a variety of applications. Noise is a key parameter in a T&H and can be traded for settling time or power consumption. The classical T&H noise design methodology considers only white noise sources, neglecting low-frequency noise sources. Although low-frequency noise contributions have been analyzed in the literature, an insightful, design-oriented analysis for flicker noise that can also be extended for arbitrary noise sources has not been proposed yet. In this brief, we present a time-domain noise analysis for a charge-redistribution T&H circuit. The analysis considers the noise contribution from white and 1/f sources. A design-oriented expression to compute the excess noise power due to flicker noise, as a function of the sampling rate, the intended T&H resolution, and the noise parameters, is obtained. This expression shows the dependence of the relative contribution of flicker noise over white noise, on the T&H design parameters. A simplified expression allows one to assess the relative contribution of flicker noise during an early stage of the design flow.
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Título | Time-Domain 1/f Noise Analysis of a Charge-Redistribution Track-and-Hold Circuit |
Autor | Jara Toro, Matías Alessandri Amenábar, Cristóbal Abusleme Hoffman, Ángel Christian |
Enlace | https://doi.org/10.1109/TCSII.2017.2684123 https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7880634 |
Revista | IEEE Transactions on Circuits and Systems II: Express Briefs |
Volumen | 65 |
Número de publicación | 2 |
Fecha de publicación | 2018 |
Tipo de documento | artículo |
DOI | 10.1109/TCSII.2017.2684123 |
Derechos | acceso restringido |
ISSN | 1558-3791 |
Id de publicación en WoS | WOS:000423551600005 |
Palabra clave | Time-domain analysis White noise Circuits and systems Low-frequency noise Tin Power demand Transistors |
Página final | 165 |
Página inicio | 161 |
Resumen | Track-and-hold (T&H) circuits are used in a variety of applications. Noise is a key parameter in a T&H and can be traded for settling time or power consumption. The classical T&H noise design methodology considers only white noise sources, neglecting low-frequency noise sources. Although low-frequency noise contributions have been analyzed in the literature, an insightful, design-oriented analysis for flicker noise that can also be extended for arbitrary noise sources has not been proposed yet. In this brief, we present a time-domain noise analysis for a charge-redistribution T&H circuit. The analysis considers the noise contribution from white and 1/f sources. A design-oriented expression to compute the excess noise power due to flicker noise, as a function of the sampling rate, the intended T&H resolution, and the noise parameters, is obtained. This expression shows the dependence of the relative contribution of flicker noise over white noise, on the T&H design parameters. A simplified expression allows one to assess the relative contribution of flicker noise during an early stage of the design flow. |
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