A current sensing circuit with AC and DC temperature compensation for sensing current through an output inductor which has an inherent DC resistor with a temperature varying resistance. Various embodiments of the present invention are generally directed to a load beam coupled to a plate via a gimbal. The back end device implements various state-based functions that are processor and memory intensive. At least one of size, color, shape and brightness of the marker is set in accordance with the risk potential. Thus, a constant voltage control device obtaining two types of stabilized voltages from external power supply of large voltage variation can reduce power consumption and improve voltage control accuracy.