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A Transceiver Front End for Electronic Control Units in FlexRay-Based Automotive Communication Systems

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4 Author(s)
Chua-Chin Wang ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Gang-Neng Sung ; Po-Cheng Chen ; Chin-Long Wey

This paper presents an in-car networking transceiver front end that is compliant with FlexRay automotive electronic standards. A low-voltage differential-signaling-like transmitter is proposed to drive the twisted pair of the bus. Furthermore, a three-comparator scheme is used to carry out bit slicing and state recognition at the receiver end. In order to resist process and temperature variation, a 20-MHz clock generator with process, supply voltage, and temperature compensation is proposed in this paper. A prototype system as well as a chip implemented by using a typical 0.18 ??m single-poly six-metal CMOS process is reported in this paper. The proposed prototypical transceiver front end has been tested by the thermo chamber and a FlexRay development board to certify its operation in the [-40??C-+125??C] temperature range and FlexRay standards. The power consumption of the whole chip is 43.01 mW at a 10 Mbit/s throughput. The core area of this design is 0.117 mm2. The maximal throughput of the proposed prototypical transceiver front end can reach 40 Mbit/s.

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Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:57 ,  Issue: 2 )