Patent ID: 8362790
Filing Date: 2013-01-29
Classification: G01R

Abstract:
1. An alternating current (AC) detection circuit, comprising: a rectifying part for rectifying an AC voltage; a voltage division part for dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part for stabilizing the voltage divided by the voltage division part; a comparing part for comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage and generating an input detection signal when the stabilized voltage is higher than the internal reference voltage; and an output part for outputting first and second AC detection signal signals when the input detection signal is inputted from the comparing part, wherein the comparing part comprises a shunt regulator including: the output part comprises a first output part and a second output part, the first output part comprises an NPN transistor including: the second output part is configured as a photocoupler comprising: