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Design of a discrete-time quadrature delta-sigma modulator
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Abstract: (122 Views) |
Quadrature delta-sigma modulators with equivalent power consumption and hardware in comparison with real delta-sigma, have a larger bandwidth and have become popular for use in Low IF receivers. In this type of receivers, the output of the complex mixer is directly converted to digital by a quadrature modulator. Using a quadrature modulator instead of two real modulators increases the efficiency of the receiver and reduces power consumption in this structure. In this article, the structure of the quadrature delta-sigma modulator is investigated and its difference with the real low-pass and band-pass delta-sigma modulators is described. For Sample, a two order real time discrete modulator has been designed and converted into a quadrature modulator.
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| Keywords: quadrature delta-sigma modulator, discrete time, Low IF receiver |
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Full-Text [PDF 979 kb]
(61 Downloads)
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Type of Study: Scientific-extension |
Subject:
Special
Received: 2025/06/1 | Accepted: 2025/03/5 | Published: 2025/03/5
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