  In this work, we introduce a new design concept: the DC-Coupled Resistive
Silicon Detectors, based on the LGAD technology. This new approach intends to
address a few known features of the first generation of AC-Coupled Resistive
Silicon Detectors (RSD). Our simulation exploits a fast hybrid approach based
on a combination of two packages, Weightfield2 and LTSpice. It demonstrates
that the key features of the RSD design are maintained, yielding excellent
timing and spatial resolutions: a few tens of ps and a few microns. In the
presentation, we will outline the optimization methodology and the results of
the simulation. We will present detailed studies on the effect of changing the
ratio between the n+ layer resistivity and the low-resistivity ring and on the
achievable temporal and spatial resolution.
