Continuous-Time ΣΔ modulators with VCO-Based voltage-to-phase and voltage-to-frequency quantizers - Archive ouverte HAL Access content directly
Conference Papers Year : 2010

Continuous-Time ΣΔ modulators with VCO-Based voltage-to-phase and voltage-to-frequency quantizers

Abstract

In this paper, two different VCO-Based quantizers architectures are implemented and compared as multi-bit quantizers of Continuous-Time (CT) Sigma-Delta (ΣΔ) modulator. The first one is the voltage-to-frequency while the second is the voltage-to-phase architecture. Two 4th order CT-ΣΔ modulators are designed with Voltage-to-frequency and voltage-to-phase quantizers respectively. Both modulators are designed and simulated in 0.13µm technology. The comparision shows that voltage-to-phase quantizer remarkably reduces the VCO non-linearity and increases the modulator's maximum SNR.

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Electronics
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Dates and versions

hal-00626957 , version 1 (27-09-2011)

Identifiers

Cite

Mootaz Allam, Hassan Aboushady, Marie-Minerve Louërat. Continuous-Time ΣΔ modulators with VCO-Based voltage-to-phase and voltage-to-frequency quantizers. MWSCAS 2010 - Midwest Symposium on Circuits and Systems, Aug 2010, Seattle, United States. pp.676 - 679, ⟨10.1109/MWSCAS.2010.5548917⟩. ⟨hal-00626957⟩
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