A PMOS present mirror, also referred to as a PMOS cascode present mirror, is a sort of present mirror that makes use of PMOS transistors as a substitute of NMOS transistors. It’s typically utilized in analog circuit design to supply a extra correct and steady present supply than a easy NMOS present mirror. The pole of a PMOS present mirror is the frequency at which the output present begins to roll off. It is very important calculate the pole frequency to make sure that the present mirror will function correctly within the desired frequency vary.
The pole frequency of a PMOS present mirror is set by the next equation:
