Multi-stage noise band cancellation ΣΔ modulator for digitisation of distorted signals

D. K.G. Pham; P. Desgreys; P. Loumeau; T. Ridgers

doi:10.1049/el.2012.0533

Multi-stage noise band cancellation ΣΔ modulator for digitisation of distorted signals

D. K.G. Pham
, P. Desgreys
, P. Loumeau
, T. Ridgers

Research output: Contribution to journal › Article › peer-review

Abstract

A new sigma-delta modulator (ΣΔM) architecture is proposed to digitise wideband distorted signals. It combines frequency band decomposition with bandpass (BP) ΣΔ converters and cascaded architectures. The novelties are the use of the residual signal transfer function at the output of the first summing node in a classical BP ΣΔ that is an almost free signal shaping in the ΣΔM and the digitisation of the shaped noise in order to cancel it out in a particular band.

Original language	English
Pages (from-to)	560-562
Number of pages	3
Journal	Electronics Letters
Volume	48
Issue number	10
DOIs	https://doi.org/10.1049/el.2012.0533
Publication status	Published - 10 May 2012
Externally published	Yes

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10.1049/el.2012.0533

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abstract = "A new sigma-delta modulator (ΣΔM) architecture is proposed to digitise wideband distorted signals. It combines frequency band decomposition with bandpass (BP) ΣΔ converters and cascaded architectures. The novelties are the use of the residual signal transfer function at the output of the first summing node in a classical BP ΣΔ that is an almost free signal shaping in the ΣΔM and the digitisation of the shaped noise in order to cancel it out in a particular band.",

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AB - A new sigma-delta modulator (ΣΔM) architecture is proposed to digitise wideband distorted signals. It combines frequency band decomposition with bandpass (BP) ΣΔ converters and cascaded architectures. The novelties are the use of the residual signal transfer function at the output of the first summing node in a classical BP ΣΔ that is an almost free signal shaping in the ΣΔM and the digitisation of the shaped noise in order to cancel it out in a particular band.

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Multi-stage noise band cancellation ΣΔ modulator for digitisation of distorted signals

Abstract

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