power distribution and grounding

bias HV distributed via half sector detector anode planes
low voltage power distributed via FEM board for each half sector
separate digital and analog ground planes for FEM boards
LDO series regulators used on FEM to isolate FEM’s power from common voltage buses in detector
5 sets of 3 LDO series regulators regulate DMU +5, TGLDx +5 digital & TGLDx +5 analog for each row of 9 ROCs
ROC power supplies are multiply bypassed
local reference & bias voltages for TGLDx chips are multiply bypassed
local pixel HV bias bypass caps are referenced back to the analog Vdd of the ROC