Abstract
A bandpass delta-sigma modulator with a widely tunable center frequency range for direct digitization of IF or RF signals can be a key building block for highly digitized radio receivers. The performance of the bandpass modulator is highly dependent on the accuracy of the noise transfer function zero locations in the presence of process spread. An automatic calibration method is proposed to calibrate the noise transfer function zeros to their desired locations based on minimizing the variance of the decimated output bitstream of the modulator. The calibration does not need external test stimuli nor does it require complex hardware.
Original language | English |
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Title of host publication | IEEE 58th International Midwest Symposium on Circuits and Systems |
Subtitle of host publication | Climbing to New Heights, MWSCAS 2015 - Conference Proceedings |
Place of Publication | Piscataway |
Publisher | Institute of Electrical and Electronics Engineers |
Number of pages | 4 |
ISBN (Electronic) | 978-1-4673-6558-1 |
DOIs | |
Publication status | Published - 28 Sep 2015 |
Event | 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States Duration: 2 Aug 2015 → 5 Aug 2015 |
Conference
Conference | 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 |
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Country/Territory | United States |
City | Fort Collins |
Period | 2/08/15 → 5/08/15 |
Keywords
- analog-to-digital converter
- bandpass delta-sigma modulator
- calibration
- filter