DocumentCode
1511709
Title
80 MHz bandpass delta-sigma modulator using switched-capacitor resonator structure
Author
Salo, T. ; Lindfors, S. ; Halonen, K.
Author_Institution
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Volume
37
Issue
14
fYear
2001
fDate
7/5/2001 12:00:00 AM
Firstpage
877
Lastpage
878
Abstract
A fully differential 80 MHz fourth-order bandpass ΔΣ modulator, meant for a 100 MHz GSM/WCDMA multimode IF receiver, is presented. The modulator is based on a double-delay single opamp SC-resonator structure which is well suited for low supply voltages. Furthermore, the centre frequency of the topology is insensitive to different component variances. The measured peak SNR is 78 dB and 43.3 dB for 270 kHz (GSM) and 3.84 MHz (WCDMA) bandwidths, respectively
Keywords
CMOS integrated circuits; analogue-digital conversion; cellular radio; code division multiple access; delta-sigma modulation; high-speed integrated circuits; modulators; switched capacitor networks; 100 MHz; 270 kHz; 3.84 MHz; 43.3 dB; 78 dB; 80 MHz; GSM/WCDMA multimode IF receiver; bandpass delta-sigma modulator; double-delay single opamp SC-resonator structure; fourth-order ΔΣ modulator; fully differential ΔΣ modulator; high resolution ADC; low supply voltages; switched-capacitor resonator; wideband CDMA;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20010599
Filename
935112
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