Title :
A stepped-up tree encoder for the 10-ps Wave Union TDC
Author :
Xueye Hu ; Lei Zhao ; Shubin Liu ; Jinhong Wang ; Qi An
Author_Institution :
State Key Lab. of Particle Detection & Electron., Univ. of Sci. & Technol. of China, Hefei, China
Abstract :
We proposed a stepped-up tree encoder (SUTE) to deal with the issue of non-thermometer-to-binary (NTH2B) for our 10-ps Wave Union FPGA TDC. The encoder is made up of two pipelining stages: a pre-encoding and a parallel-encoding, and is capable of bubble error correction (BEC) as well. With this encoding algorithm applied in Xilinx Virtex-4 FPGA, we achieved a NTH2B conversion rate of up to 100 MHz for more than 200-bit non-thermometer codes.
Keywords :
encoding; error correction codes; field programmable gate arrays; pipeline processing; time-digital conversion; tree codes; 10-ps wave union FPGA TDC; BEC; NTH2B conversion rate; SUTE; Xilinx Virtex-4 FPGA; bubble error correction; nonthermometer codes; nonthermometer-to-binary; parallel-encoding; pipelining stages; preencoding; stepped-up tree encoder; Binary codes; Clocks; Delay; Encoding; Field programmable gate arrays; Pipeline processing; Table lookup;
Conference_Titel :
Real Time Conference (RT), 2012 18th IEEE-NPSS
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-1082-6
DOI :
10.1109/RTC.2012.6418105
