# # Distributed ByPass Capacitor NETs # # Key In Nets File for the # HUB-0 ATLAS L1Calo Hub Module # ---=====----------------------------- # # Original Rev. 20-Jan-2016 # Most Recent Rev. 9-Nov-2016 # # # This file holds the nets for the "Distributed" bypass capacitors. # # These are the bypass capacitors that are placed # opportunistically during routing or that are placed # because during routing it looks like the circuit could # benefit from an additional bypass capacitor, e.g. for # symmetry of the layout. # # These bypass capacitors can be on any of the power nets. # # # # Neither the: SWCH_1V2 (DCDC5) or the # FAN_1V8 (DCDC7) or the # BULK_3V3 (DCDC8) # # converters have large Tantalum capacitors as part of # their Output Filters in their main comps and nets files. # # All of the other DCDC Converters pick up Output Filter # Tantalum Capacitors as part of their supply to the FPGA. # # So here are the nets for some large Tantalum capacitors # for each of these 3 supplies. # # # There are also some Distributed ByPass Capacitors for # the BULK_1V8 bus. These are needed because, although # there are two Tantalum caps on the BULK_1V8 located by # the FPGA, this is a long way from the BULK_1V8 converter # which is located up in the North-East corner. So I # have placed some Distributed bypass caps up by it, # including one Tantalum. BULK_1V8 is DCDC6. # # # # For the SWCH_1V2 converter. # NET 'SWCH_1V2' C251-1 C252-1 C267-1 NET 'GROUND' C251-2 C252-2 C267-2 NET 'SWCH_1V2' C269-1 C270-1 C271-1 NET 'GROUND' C269-2 C270-2 C271-2 # # For the FAN_1V8 converter. # NET 'FAN_1V8' C253-1 C254-1 C255-1 C256-1 NET 'GROUND' C253-2 C254-2 C255-2 C256-2 NET 'FAN_1V8' C259-1 C260-1 C261-1 C262-1 NET 'GROUND' C259-2 C260-2 C261-2 C262-2 NET 'FAN_1V8' C263-1 C264-1 C265-1 C266-1 NET 'GROUND' C263-2 C264-2 C265-2 C266-2 NET 'FAN_1V8' C277-1 C278-1 NET 'GROUND' C277-2 C278-2 # # For the BULK_3V3 converter. # NET 'BULK_3V3' C257-1 C258-1 C268-1 C279-1 NET 'GROUND' C257-2 C258-2 C268-2 C279-2 NET 'BULK_3V3' C272-1 C273-1 NET 'GROUND' C272-2 C273-2 # # For the BULK_1V8 converter. # NET 'BULK_1V8' C274-1 C275-1 C276-1 NET 'GROUND' C274-2 C275-2 C276-2