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Conference Paper Advanced Class-S Transmitter with Tri-level Delta-Sigma Modulator
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Authors
Young-Kyun Cho, Sung Jun Lee, Seung Hyun Jang, Bong Hyuk Park, Jae Ho Jung, Kwang Chun Lee
Issue Date
2013-11
Citation
Asia-Pacific Microwave Conference (APMC) 2013, pp.1015-1017
Publisher
IEEE
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/APMC.2013.6695009
Abstract
An advanced Class-S transmitter based on a tri-level delta-sigma modulator (DSM) is presented. The second order DSM shows a signal-to-noise and distortion ratio (SNDR) of 44.7 dB and a spurious-free dynamic range (SFDR) of 63.6 dB with a 3.1-MHz sinusoidal input at 522.24-MS/s using an offset cancellation scheme. The proposed technique improves the SFDR and SNDR over 10 dB and 3 dB, respectively. The proposed scheme can effectively control the input referred offset voltage of the DSM, resulting in the improvement of spectrum efficiency. The power consumption of the modulator is 13.4 mW from a 1.2 V supply. Measurements with a mixer show that the proposed modulator modulates a 10-MHz long-term evolution signal which has an 8.5 dB peak-to-average ratio with 3.30 % error vector magnitude and 38.7 dB adjacent channel leakage ratio at 2.6 GHz. © 2013 IEEE.
KSP Keywords
2.6 GHz, Adjacent channel leakage ratio(ACLR), Advanced class-S transmitter, Delta-Sigma Modulator, Distortion ratio, Long term Evolution(LTE), Power Consumption, Signal-to-Noise, Spectrum efficiency, error vector magnitude, offset cancellation