1. Introduction The ramp function, the notation of which is R(x), is a discontinuous, single-valued function of a real variable with a point discontinuity located at zero. For negative arguments, R(x) vanishes, whilst for positive arguments, R(x) is simply x [1]. In addition, its first derivative is the Heaviside step function, also known as the unit step function, whereas its second derivative is the Dirac delta distribution (or δ distribution), also known as the unit impulse [2].
