A low-latency, low-overhead encoder for data transmission in the ATLAS Liquid Argon Calorimeter trigger upgrade

• DOI: 10.1016/j.nima.2016.03.067
• Publication Date: 2016-03-24T18:29:25Z
• Authors: Le Xiao; Xiaoting Li; Datao Gong; Jinghong Chen; Binwei Deng; Qingjun Fan; Yulang Feng; Di Guo; Huiqin He; Suen Hou; Guangming Huang; Chonghan Liu; Tiankuan Liu; Xiangming Sun; Yuxuan Tang; Ping-Kun Teng; Bozorgmehr Vosooghi; Annie C. Xiang; Jingbo Ye; Yang You; Zhiheng Zuo
• Keywords: Upgrade; Application-specific integrated circuit

Abstract In this paper, we present the design and test results of an encoder integrated circuit for the ATLAS Liquid Argon Calorimeter trigger upgrade. The encoder implements a low-latency and low-overhead line code called LOCic. The encoder operates at 320 MHz with a latency of no greater than 21 ns. The overhead of the encoder is 14.3%. The encoder is an important block of the transmitter ASIC LOCx2, which is prototyped with a commercial 0.25 μm Silicon-on-Sapphire CMOS technology and packaged in a 100-pin QFN package.