Analytical method to determine optimal out-of-band gain in multi-bit delta-sigma modulator

Awinash Anand; Nischal Koirala; Ramesh K. Pokharel; Haruichi Kanaya; Keiji Yoshida

doi:10.1587/elex.9.1598

Analytical method to determine optimal out-of-band gain in multi-bit delta-sigma modulator

Awinash Anand, Nischal Koirala, Ramesh K. Pokharel, Haruichi Kanaya, Keiji Yoshida

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

Abstract

A simple, systematic and deterministic MATLAB simulation which employs Risbo method and analytical simulation is proposed to determine the optimal out-of-band gain to achieve a maximal SNR and the maximum stable amplitude in a multi-bit delta-sigma modulator. Using the proposed method, a 128MS/s, 2MHz signal bandwidth 4<sup>th</sup> order 2-bit continuous-time delta-sigma modulator is designed and implemented in 0.18µm CMOS technology to verify the concept. As a result, the modulator achieves a peak SNDR of 79.3dB and a dynamic range of 83dB for a 2MHz signal bandwidth (OSR = 32) while consuming only 7.8mW from 1.8V supply.

Original language	English
Pages (from-to)	1598-1603
Number of pages	6
Journal	IEICE Electronics Express
Volume	9
Issue number	20
DOIs	https://doi.org/10.1587/elex.9.1598
Publication status	Published - 2012

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title = "Analytical method to determine optimal out-of-band gain in multi-bit delta-sigma modulator",

abstract = "A simple, systematic and deterministic MATLAB simulation which employs Risbo method and analytical simulation is proposed to determine the optimal out-of-band gain to achieve a maximal SNR and the maximum stable amplitude in a multi-bit delta-sigma modulator. Using the proposed method, a 128MS/s, 2MHz signal bandwidth 4th order 2-bit continuous-time delta-sigma modulator is designed and implemented in 0.18µm CMOS technology to verify the concept. As a result, the modulator achieves a peak SNDR of 79.3dB and a dynamic range of 83dB for a 2MHz signal bandwidth (OSR = 32) while consuming only 7.8mW from 1.8V supply.",

author = "Awinash Anand and Nischal Koirala and Pokharel, {Ramesh K.} and Haruichi Kanaya and Keiji Yoshida",

year = "2012",

doi = "10.1587/elex.9.1598",

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T1 - Analytical method to determine optimal out-of-band gain in multi-bit delta-sigma modulator

AU - Anand, Awinash

AU - Koirala, Nischal

AU - Pokharel, Ramesh K.

AU - Kanaya, Haruichi

AU - Yoshida, Keiji

PY - 2012

Y1 - 2012

N2 - A simple, systematic and deterministic MATLAB simulation which employs Risbo method and analytical simulation is proposed to determine the optimal out-of-band gain to achieve a maximal SNR and the maximum stable amplitude in a multi-bit delta-sigma modulator. Using the proposed method, a 128MS/s, 2MHz signal bandwidth 4th order 2-bit continuous-time delta-sigma modulator is designed and implemented in 0.18µm CMOS technology to verify the concept. As a result, the modulator achieves a peak SNDR of 79.3dB and a dynamic range of 83dB for a 2MHz signal bandwidth (OSR = 32) while consuming only 7.8mW from 1.8V supply.

AB - A simple, systematic and deterministic MATLAB simulation which employs Risbo method and analytical simulation is proposed to determine the optimal out-of-band gain to achieve a maximal SNR and the maximum stable amplitude in a multi-bit delta-sigma modulator. Using the proposed method, a 128MS/s, 2MHz signal bandwidth 4th order 2-bit continuous-time delta-sigma modulator is designed and implemented in 0.18µm CMOS technology to verify the concept. As a result, the modulator achieves a peak SNDR of 79.3dB and a dynamic range of 83dB for a 2MHz signal bandwidth (OSR = 32) while consuming only 7.8mW from 1.8V supply.

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DO - 10.1587/elex.9.1598

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JO - IEICE Electronics Express

JF - IEICE Electronics Express

IS - 20

ER -

Analytical method to determine optimal out-of-band gain in multi-bit delta-sigma modulator

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