Simple Explaination of the Rate Limiter Block

I am experimenting with the Rate Limiter block attempting to create a signal resembling a Trapezoid from a Square wave. I am having some trouble with the slew rates, are these slew rates in vertical units (Volts, Amps, ect...) per second? My square wave has an amplitude of 5 V and a pulse width of 200 nano seconds. However setting rising and falling slew rates does not perform as expected. Any tips for controlling the slew rates are appreciated

Answer 1

[Fangjun Jiang]

Specifing the slew rate as e.g. 5/(25*10e-9) and -5/(25*10e-9) should give you a Trapezoid form. Specify the fixed simulation step size as 10e-9, run simulation from 0 to 2e-6

[Alec Reed]

The fixed simulation step was the issue. Thanks.