Discussion of: Development of FPGA based phase alignment logic for the high speed protocol in HEP Experiments

David:

• "zillion" is not a real number
• GBT
  • Rad-hard ASIC + protocol using lots of error bits makes robust operation in radiation environment
  • FPGA used for other end of optical link in non-radiation environment. Cheaper, OTS solution.
    • Does producing an ASIC once you have the design really cost that much compared to commercial FPGA?
  • Scrambler? ("diminishes the event of a long succession of continuous 1s or0s without extra overhead")