The analysis of nonlinear fractional-order circuits is a challenging problem. This is
due to the lack of nonlinear circuit theorems and designs particularly in the presence of
memristive elements. The response of a series connection of a simple resistor with fractional
order capacitor and its analytical formulation in both charging and discharging phases is
considered. The numerical simulation of fractional order HP memristor in series with a
fractional order capacitor is also discussed. It is a demonstration of a simple nonlinear