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A Coin-Battery-Powered LDO-Free 2.4-GHz Bluetooth Low-Energy Transmitter with 34.7% Peak System Efficiency
Peng X.1; Yin J.1; Yu W.-H.1; Mak P.-I.1; Martins R.P.1
2018-09-01
Source PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
ISSN15497747
Volume65Issue:9Pages:1174-1178
Abstract

This brief reports a 2.4-GHz Bluetooth low-energy (BLE) transmitter (TX) that can operate against a coinbattery voltage discharging from 1.5 to 1 V, corresponding to a 99.2% battery capacity usage. Specifically, a class-B/C push-pull power amplifier with dual feedback control loops is proposed to dynamically adjust two gate biases, ensuring stable output power and low output HD2. The TX fabricated in 65-nm CMOS occupies a die area of 0.5 mm and achieves three stable power levels: P (2.7 ± 0.4 dBm), P (-0.1 ± 0.6 dBm), and P (-2.5 ± 0.8 dBm). At P, the system efficiency reaches 34.7%. The 1-Mb/s GFSK output (m = 0.5) and HD comply with the BLE specifications, and the FSK error is 8.2%. A tiny demo board with an antenna, a crystal, and a coin battery (Nanfu LR44) verifies the feasibility of the TX over-the-air, achieving 27.5 h of continuous operation for a 1-dB reduction of the received power.

KeywordBattery Capacity Usage (Bcu) Bluetooth Low-energy (Ble) Cmos Direct-coin-battery-powered (Dcbp) Output Power Power Amplifier (Pa) System Efficiency
DOIhttp://doi.org/10.1109/TCSII.2018.2816245
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000443055200010
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Citation statistics
Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorYin J.; Mak P.-I.
Affiliation1.Universidade de Macau
2.Instituto Superior Técnico
Recommended Citation
GB/T 7714
Peng X.,Yin J.,Yu W.-H.,et al. A Coin-Battery-Powered LDO-Free 2.4-GHz Bluetooth Low-Energy Transmitter with 34.7% Peak System Efficiency[J]. IEEE Transactions on Circuits and Systems II: Express Briefs,2018,65(9):1174-1178.
APA Peng X.,Yin J.,Yu W.-H.,Mak P.-I.,&Martins R.P..(2018).A Coin-Battery-Powered LDO-Free 2.4-GHz Bluetooth Low-Energy Transmitter with 34.7% Peak System Efficiency.IEEE Transactions on Circuits and Systems II: Express Briefs,65(9),1174-1178.
MLA Peng X.,et al."A Coin-Battery-Powered LDO-Free 2.4-GHz Bluetooth Low-Energy Transmitter with 34.7% Peak System Efficiency".IEEE Transactions on Circuits and Systems II: Express Briefs 65.9(2018):1174-1178.
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