Linearity enhancement in a configurable sigma-delta modulator
2005 (English)In: IEEE-NEWCAS Conference, 2005. The 3rd International / [ed] IEEE, IEEE conference proceedings, 2005, 59-62 p.Conference paper (Refereed)
A highly linear sigma-delta modulator for dual-standard receivers is presented. The modulator makes use of low-distortion sigma-delta modulator architecture to attain high linearity over a wide bandwidth. The dual-band modulator employs a 2nd order single-bit sigma-delta modulator with feedforward path for GSM mode and a 4th order modified cascaded modulator with single-bit in the first stage and 4-bit in the second for WCDMA mode. The modulator is designed in TSMC 0.18μm CMOS technology and operates at 1.8 supply voltage. It achieves in GSM/WCDMA mode a peak SNDR of 83/75dB, a 96/84dB SFDR and an IMD3 of -93/-82dB for an OSR of 160/16.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2005. 59-62 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-58777DOI: 10.1109/NEWCAS.2005.1496663ScopusID: 2-s2.0-33745766467ISBN: 0-7803-8934-4OAI: oai:DiVA.org:kth-58777DiVA: diva2:473977
NEWCAS 2005, The 3rd International IEEE-NEWCAS Conference, Quebec City, Canada, 19-22 June, 2005
QC 201201102012-01-082012-01-082012-10-02Bibliographically approved