TY - JOUR
T1 - A 0.025-0.45 W 60%-efficiency inductive-coupling power transceiver with 5-bit dual-frequency feedforward control for non-contact memory cards
AU - Chung, Hayun
AU - Radecki, Andrzej
AU - Miura, Noriyuki
AU - Ishikuro, Hiroki
AU - Kuroda, Tadahiro
N1 - Funding Information:
Manuscript received March 16, 2012; revised June 12, 2012; accepted June 19, 2012. Date of publication August 31, 2012; date of current version October 03, 2012. This paper was approved by Associate Editor Peter Gillingham. This work was supported by CREST/JST. H. Chung was with Keio University, Yokohama, 223-8522 Japan. She is currently with the Korea Advanced Institute of Science and Technology, Deajeon, 305-701 Korea (e-mail: [email protected]). A. Radecki, N. Miura, H. Ishikuro, and T. Kuroda are with Keio University, Yokohama, 223-8522 Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/JSSC.2012.2206686
PY - 2012
Y1 - 2012
N2 - A 0.025-0.45 W inductive-coupling power transceiver for non-contact memory applications is presented. To deal with sudden and large load variations and achieve high-efficiency, we propose a power transceiver with 5-bit feedforward control. Knowing that load patterns of a memory card have strong correlation with commands issued by a host, feedforward control is applied to minimize response times. To achieve 5-bit power levels, the proposed transceiver utilizes pulse-density modulation (PDM) and a multi-channel structure. Different operation frequencies are chosen for each channel to maximize power transfer efficiency. To further improve transceiver efficiency and enable high-speed operation, an active rectifier with a fast positive feedback is proposed. The test prototype demonstrates 40%-70% efficiency across all load conditions and 60% efficiency in average, which are over an order of magnitude improvements compared to prior arts.
AB - A 0.025-0.45 W inductive-coupling power transceiver for non-contact memory applications is presented. To deal with sudden and large load variations and achieve high-efficiency, we propose a power transceiver with 5-bit feedforward control. Knowing that load patterns of a memory card have strong correlation with commands issued by a host, feedforward control is applied to minimize response times. To achieve 5-bit power levels, the proposed transceiver utilizes pulse-density modulation (PDM) and a multi-channel structure. Different operation frequencies are chosen for each channel to maximize power transfer efficiency. To further improve transceiver efficiency and enable high-speed operation, an active rectifier with a fast positive feedback is proposed. The test prototype demonstrates 40%-70% efficiency across all load conditions and 60% efficiency in average, which are over an order of magnitude improvements compared to prior arts.
KW - Active rectifier
KW - dual-frequency
KW - feedforward
KW - high efficiency
KW - inductive-coupling
KW - power transceiver
KW - wide load range
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U2 - 10.1109/JSSC.2012.2206686
DO - 10.1109/JSSC.2012.2206686
M3 - Article
AN - SCOPUS:84867401312
SN - 0018-9200
VL - 47
SP - 2496
EP - 2504
JO - IEEE Journal of Solid-State Circuits
JF - IEEE Journal of Solid-State Circuits
IS - 10
M1 - 6293915
ER -