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We describe a FPGA-based, 96-channel, time-to-digital converter (TDC) intended for use with the central outer tracker (COT) in the CDF experiment at the Fermilab Tevatron. The COT system is digitized and read out by 315 TDC cards, each serving 96 wires of the chamber. The TDC, which is implemented as a 9U VME card, has been built around two Altera Stratix FPGAs. The special capabilities of this device...
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