A novel output transformer based highly linear RF-DAC architecture

E. Bechthum; G.I. Radulov; J. Briaire; G. Geelen; A.H.M. Roermund, van

doi:10.1109/ECCTD.2013.6662314

A novel output transformer based highly linear RF-DAC architecture

E. Bechthum, G.I. Radulov, J. Briaire, G. Geelen, A.H.M. Roermund, van

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

A major limitation of the linearity of Current Steering (CS) RF-DACs is the large output voltage swing (typically 1Vpp), which couples to sensitive internal nodes and thereby causes non-linear distortion. This paper proposes a novel approach for the linearization of the CS RF-DAC. An output transformer decouples the output from the circuit core and attenuates the voltage swing seen by the RF-DAC current cells. A lumped element model of a transformer is used in calculations and simulations to analyze the performance of the transformer in the Mixing-DAC application, and to select optimal design parameters for high linearity. Verification with a simulation model of an RF-DAC shows that the output related non-linearity (IMD3) of the CS RF-DAC improves with about 14dB when the proposed transformer parameters are used

Original language	English
Title of host publication	Proceedings of the 21st European Conference on Circuit Theory and Design (ECCTD 2013), 8-12 September 2013, Dresden, Germany
Pages	1-4
DOIs	https://doi.org/10.1109/ECCTD.2013.6662314
Publication status	Published - 2013

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title = "A novel output transformer based highly linear RF-DAC architecture",

abstract = "A major limitation of the linearity of Current Steering (CS) RF-DACs is the large output voltage swing (typically 1Vpp), which couples to sensitive internal nodes and thereby causes non-linear distortion. This paper proposes a novel approach for the linearization of the CS RF-DAC. An output transformer decouples the output from the circuit core and attenuates the voltage swing seen by the RF-DAC current cells. A lumped element model of a transformer is used in calculations and simulations to analyze the performance of the transformer in the Mixing-DAC application, and to select optimal design parameters for high linearity. Verification with a simulation model of an RF-DAC shows that the output related non-linearity (IMD3) of the CS RF-DAC improves with about 14dB when the proposed transformer parameters are used",

author = "E. Bechthum and G.I. Radulov and J. Briaire and G. Geelen and \{Roermund, van\}, A.H.M.",

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doi = "10.1109/ECCTD.2013.6662314",

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A novel output transformer based highly linear RF-DAC architecture. / Bechthum, E.; Radulov, G.I.; Briaire, J. et al.
Proceedings of the 21st European Conference on Circuit Theory and Design (ECCTD 2013), 8-12 September 2013, Dresden, Germany. 2013. p. 1-4.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Radulov, G.I.

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AU - Roermund, van, A.H.M.

PY - 2013

Y1 - 2013

N2 - A major limitation of the linearity of Current Steering (CS) RF-DACs is the large output voltage swing (typically 1Vpp), which couples to sensitive internal nodes and thereby causes non-linear distortion. This paper proposes a novel approach for the linearization of the CS RF-DAC. An output transformer decouples the output from the circuit core and attenuates the voltage swing seen by the RF-DAC current cells. A lumped element model of a transformer is used in calculations and simulations to analyze the performance of the transformer in the Mixing-DAC application, and to select optimal design parameters for high linearity. Verification with a simulation model of an RF-DAC shows that the output related non-linearity (IMD3) of the CS RF-DAC improves with about 14dB when the proposed transformer parameters are used

AB - A major limitation of the linearity of Current Steering (CS) RF-DACs is the large output voltage swing (typically 1Vpp), which couples to sensitive internal nodes and thereby causes non-linear distortion. This paper proposes a novel approach for the linearization of the CS RF-DAC. An output transformer decouples the output from the circuit core and attenuates the voltage swing seen by the RF-DAC current cells. A lumped element model of a transformer is used in calculations and simulations to analyze the performance of the transformer in the Mixing-DAC application, and to select optimal design parameters for high linearity. Verification with a simulation model of an RF-DAC shows that the output related non-linearity (IMD3) of the CS RF-DAC improves with about 14dB when the proposed transformer parameters are used

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BT - Proceedings of the 21st European Conference on Circuit Theory and Design (ECCTD 2013), 8-12 September 2013, Dresden, Germany

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A novel output transformer based highly linear RF-DAC architecture

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