A 5.5-dBm, 31.9% Efficiency 915-MHz Transmitter Employing Frequency Tripler and 207-mu W Synthesizer

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A 915-MHz binary frequency-shift keying (BFSK) transmitter is proposed in this letter. The proposed transmitter architecture allows relaxing the frequency-tuning requirement of the conventional Internet of Things transceiver by the frequency-tripling signal-path topology. The tuning-range requirement is significantly improved down to 4% with the proposed signaling scheme, and this results in the ultralow-power synthesizer implementation. The proposed frequency tripler provides good spur rejection performance, and the adoption of a class-D switching power amplifier (PA) further improves the efficiency of the BFSK transmitter. Implemented in a 55-nm CMOS technology, the proposed transmitter achieves the output power of 5.5 dBm and 31.9% efficiency with only 207 mu W of power consumption from the synthesizer.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2020-01
Language
English
Article Type
Article
Citation

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v.30, no.1, pp.90 - 93

ISSN
1531-1309
DOI
10.1109/LMWC.2019.2953208
URI
http://hdl.handle.net/10203/272195
Appears in Collection
EE-Journal Papers(저널논문)
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