Also known as Cathode Front-End Board (CFEB)
Links:
The CSC local trigger localizes the muon track to one-half of a strip width in each cathode layer. This is done with a 16-channel 'comparator' ASIC that inputs amplified and shaped signals and compares the charges on all adjacent and next-to-adjacent strips.
If a strip charge is found to be larger than those on its neighbors, a hit is assigned to the strip. Simultaneous comparison of left versus right neighbor strip charges allows assignment of the hit to the right or left side of the central strip, effectively doubling the resolution.