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 :
A stepped-up tree encoder (SUTE) has been designed to deal with the issue of non-thermometer-to-binary (NTH2B) encoding for a 10-ps wave union FPGA TDC. The encoder is made up of two pipeline stages: pre-encoding and parallel encoding, and is capable of bubble error correction (BEC) as well. With this encoding algorithm applied in a 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; field programmable gate arrays; time-digital conversion; tree codes; 10-ps wave union FPGA TDC; BEC; NTH2B encoding; SUTE; Xilinx Virtex-4 FPGA; bubble error correction; nonthermometer codes; nonthermometer-to-binary; parallel encoding; pipeline stages; preencoding; stepped-up tree encoder; Clocks; Delays; Encoding; Field programmable gate arrays; Oscilloscopes; Pipeline processing; Table lookup; Encoder; field-programmable gate arrays (FPGAs); time-to-digital converter (TDC); wave union;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2013.2265555
