TY - GEN
T1 - A 6Gb/s 6pJ/b 5mm-distance non-contact interface for modular smartphones using two-fold transmission-line coupler and EMC-qualified pulse transceiver
AU - Kosuge, Atsutake
AU - Ishizuka, Shu
AU - Kadomoto, Junichiro
AU - Kuroda, Tadahiro
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/3/17
Y1 - 2015/3/17
N2 - Modular smart phones have been attracting attention (Fig. 10.1.1) because users can freely customize their phones by purchasing modules and assembling them [1]. The transfer of data between modules is accomplished by non-contact connectors. Because the connection electrodes are not exposed, there is no wear or damage and waterproofing is possible. The methods of constructing non-contact connectors include capacitive coupling, which uses flat plate electrodes [1], magnetic coupling, which uses coils [2-4], and electromagnetic coupling, which uses transmission-line couplers (TLC) [5-7]. Capacitive and magnetic coupling can be used only for narrowband communication below the resonance frequency (<1GHz). Because impedance varies with frequency, impedance matching is not possible for digital signals that include a wide range of frequency components. For that reason, these couplers can be used for the MIPI D-PHY data rate (1Gb/s), but not for M-PHY (6Gb/s). The TLC, however, can be used for broadband communication (>6GHz). Because the impedance is constant, there is little reflection and digital communication is possible. A data transfer speed of 12Gb/s has been reported for a distance of 1mm between couplers [5]. Thus, full HD (4Gb/s) or 4K (15Gb/s) video data can be transmitted over a small number of lanes.
AB - Modular smart phones have been attracting attention (Fig. 10.1.1) because users can freely customize their phones by purchasing modules and assembling them [1]. The transfer of data between modules is accomplished by non-contact connectors. Because the connection electrodes are not exposed, there is no wear or damage and waterproofing is possible. The methods of constructing non-contact connectors include capacitive coupling, which uses flat plate electrodes [1], magnetic coupling, which uses coils [2-4], and electromagnetic coupling, which uses transmission-line couplers (TLC) [5-7]. Capacitive and magnetic coupling can be used only for narrowband communication below the resonance frequency (<1GHz). Because impedance varies with frequency, impedance matching is not possible for digital signals that include a wide range of frequency components. For that reason, these couplers can be used for the MIPI D-PHY data rate (1Gb/s), but not for M-PHY (6Gb/s). The TLC, however, can be used for broadband communication (>6GHz). Because the impedance is constant, there is little reflection and digital communication is possible. A data transfer speed of 12Gb/s has been reported for a distance of 1mm between couplers [5]. Thus, full HD (4Gb/s) or 4K (15Gb/s) video data can be transmitted over a small number of lanes.
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U2 - 10.1109/ISSCC.2015.7062983
DO - 10.1109/ISSCC.2015.7062983
M3 - Conference contribution
AN - SCOPUS:84940764380
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 176
EP - 177
BT - 2015 IEEE International Solid-State Circuits Conference, ISSCC 2015 - Digest of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 62nd IEEE International Solid-State Circuits Conference, ISSCC 2015 - Digest of Technical Papers
Y2 - 22 February 2015 through 26 February 2015
ER -