IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on Advanced Processors Based on Novel Concepts in Computation
Transceiver Macro with Spread-Spectrum Clocking Capability for AC-Coupled Cable Interfaces
Takefumi YOSHIKAWAYoshihide KOMATSUTsuyoshi EBUCHITakashi HIRATA
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ジャーナル 認証あり

2008 年 E91.C 巻 9 号 p. 1444-1452

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A transceiver macro for high-speed data transmission via cable in vehicles is proposed. The transceiver uses ac coupling and bidirectional interface topology for protecting LSIs against unexpected short of cable and harness/chassis and has a spread-spectrum-clocking (SSC) generator that reduces noise due to electromagnetic interference. A driver current control has been used for fast switching of data direction on accoupled interfaces. An adaptive bandwidth control has been used in a ΔΣ PLL to improve SCC significantly. A test chip has been fabricated and shows stable and bi-directional data communication with data rate of 162 to 972 Mbps through 20-m cable. Thanks to an optimum calibration of the SSC-PLL bandwidth, it reduces peak power at 33kHz by -23dB and provides 2% modulation at a data rate of 810Mbps.
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© 2008 The Institute of Electronics, Information and Communication Engineers
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