All-digital gated ring oscillator $$\Delta \Sigma$$ Δ Σ modulators

All-digital gated ring oscillator $$\Delta \Sigma$$ Δ Σ modulators This paper presents all-digital time-mode $$\Delta \Sigma$$ Δ Σ modulators. The proposed modulators consist of a voltage-to-time integrator, a seven-stage gated ring oscillator functioning as a 3-bit quantizer, and seven digital differentiators. A detailed analysis of the nonlinear characteristics of the modulators is provided. Designed in IBM 130 nm 1.2 V CMOS technology with a 100 mV 100 kHz sinusoidal input and a 4.4 MHz frequency clock, the first-order modulator provides 47 dB SNR over 0–150 KHz bandwidth while consuming 1.1 mW while the second-order modulator provides 55 dB SNR over the same bandwidth while consuming consumes 1.45 mW. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Analog Integrated Circuits and Signal Processing Springer Journals

All-digital gated ring oscillator $$\Delta \Sigma$$ Δ Σ modulators

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Engineering; Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing
ISSN
0925-1030
eISSN
1573-1979
D.O.I.
10.1007/s10470-017-1007-2
Publisher site
See Article on Publisher Site

Abstract

This paper presents all-digital time-mode $$\Delta \Sigma$$ Δ Σ modulators. The proposed modulators consist of a voltage-to-time integrator, a seven-stage gated ring oscillator functioning as a 3-bit quantizer, and seven digital differentiators. A detailed analysis of the nonlinear characteristics of the modulators is provided. Designed in IBM 130 nm 1.2 V CMOS technology with a 100 mV 100 kHz sinusoidal input and a 4.4 MHz frequency clock, the first-order modulator provides 47 dB SNR over 0–150 KHz bandwidth while consuming 1.1 mW while the second-order modulator provides 55 dB SNR over the same bandwidth while consuming consumes 1.45 mW.

Journal

Analog Integrated Circuits and Signal ProcessingSpringer Journals

Published: Jun 24, 2017

References

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