Level-0 electronics for the LHCb rich

This note describes the Level-0 electronics for the RICH detectors of LHCb. The baseline solution for photon detection is the Pixel Hybrid Photon detector which will be read out by custom ASICs, each containing ~ 1000 channels. The specifications of such an ASIC are presented, and then results from prototype chips are described. The work required for the final version of the chip that meets all the LHCb specifications is outlined. Finally, there is a brief description of the work necessary to bump-bond the chips to silicon sensors prior to their encapsulation within the hybrid photodetectors.