A convex function is a real-valued function defined on an interval with the property that its epigraph (the set of points on or above the graph of the function) is a convex set.
A rectifier is a electrical device that converts alternating current to direct current, a process known as rectification. Rectifiers are used as components of power supplies and as detectors of radio signals. Rectifiers may be made of solid state diodes, vacuum tube diodes, mercury arc valves, and other technologies.
The silicon controlled rectifier or SCR is a very useful component and can be used to produce many different circuits. In view of its properties, the SCR is used in many power switching circuits as the device is able to handle large current levels.CR basics. The silicon controlled rectifier is operates in a different way to that of a standard bipolar transistor or FET. The silicon controlled rectifier has two electrodes that are connected to the main circuit to be controlled. These two electrodes are called the anode and cathode.