DIFFERENTIAL VOLTAGE DETECTING CIRCUIT AND A POWER SUPPLY SYSTEM HAVING THE SAME, CAPABLE OF MONITORING DIFFERENCES OF TWO VOLTAGES AND GENERATING DETECTING SIGNALS CORRESPONDING TO THE DIFFERENCES

摘要

PURPOSE: A differential voltage detecting circuit and a power supply system having the same are provided to automatically generate two voltages of which sizes and frequencies are same and phases are different at 180 degree.;CONSTITUTION: A differential voltage detecting circuit(300) comprises an input unit(310), a level reducing unit(320), and a detecting unit(330). The input unit receives two input voltages and generates differential voltage of the received two input voltages. The detecting unit monitors the differential voltage and set threshold voltage to generate detecting signals corresponding to thereof. The level reducing unit generates level reduced voltages reducing voltage level of the differential voltage and delivers to the detecting unit.;COPYRIGHT KIPO 2012