Propagation delay model of current driven RC chain

In this communication we develop models to evaluate the propagation delay of an RC ladder chain driven by a current generator. The model has been used to find the number of stages after which we introduce buffers. Results were compared between the traditional approaches and both optimizations were compared with Spice simulation and a 0.35 μm CMOS technology. The optimization based on the proposed model with respect to the traditional approach shows both a lower propagation delay and also the need of a lower number of repeaters, and hence, lower power consumption and silicon area.