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2011•Unpublished venueRequires access

Design of tunable continuous-time quadrature bandpass delta-sigma modulators

K. Sakr, Mohamed Dessouky, Abdelhalim Zekry

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Abstract

This paper presents a systematic design technique for a tunable continuous-time quadrature bandpass delta-sigma modulator. The tuning range of the modulator covers from 0.05 to 0.45 of the sampling frequency. The design procedure is applied to the design of a second-order modulator. Results show that the Signal-to-Noise Ratio (SNR) is almost constant and no stability problem occurs over the whole tuning range thanks to a Digital-to-Analog Converter (DAC) compensation scheme.

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What this paper is about

This paper presents a systematic design technique for a tunable continuous-time quadrature bandpass delta-sigma modulator. The tuning range of the modulator covers from 0.05 to 0.45 of the sampling frequency. The design procedure is applied to the design of a second-order modulator. Results show that the Signal-to-Noise Ratio (SNR) is almost constant and no stability problem occurs over the whole tuning range thanks to a Digital-to-Analog Converter (DAC) compensation scheme.

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Available abstract

This paper presents a systematic design technique for a tunable continuous-time quadrature bandpass delta-sigma modulator. The tuning range of the modulator covers from 0.05 to 0.45 of the sampling frequency. The design procedure is applied to the design of a second-order modulator. Results show that the Signal-to-Noise Ratio (SNR) is almost constant and no stability problem occurs over the whole tuning range thanks to a Digital-to-Analog Converter (DAC) compensation scheme.

Key concepts: Delta-sigma modulation, Band-pass filter, Electronic engineering, Quadrature (astronomy), Sigma, Control theory (sociology), Computer science, Physics

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