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Low-distortion bandpass Sigma-Delta modulator for wireless radio receivers
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och Informationsteknik, IMIT.ORCID-id: 0000-0003-3802-7834
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och Informationsteknik, IMIT.
2005 (engelsk)Inngår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 41, nr 19, s. 1044-1046Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A low-distortion bandpass sigma-delta modulator is proposed. It was found that the key to improving linearity is to add a feedforward signal path in a double-delay resonator bandpass structure. The proposed technique improves the tonal behaviour even at low oversampling ratio and can be applied for any order of modulator. Based on the proposed architecture, a fourth-order single-bit sigma-delta modulator can achieve a dynamic range of 84 dB and a spurious free dynamic range of 98 dB at 10.71 MHz with a signal bandwidth of 200 kHz, making it ideal for a narrowband IF-sampled wireless receiver designed for compliance with GSM/GPRS standards.

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2005. Vol. 41, nr 19, s. 1044-1046
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URN: urn:nbn:se:kth:diva-15097DOI: 10.1049/el:20052167ISI: 000232469300005Scopus ID: 2-s2.0-25444514033OAI: oai:DiVA.org:kth-15097DiVA, id: diva2:333138
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QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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