Patent ID: 8248258
Filing Date: 2012-08-21
Classification: G06F

Abstract:
1. A wakeup device detecting voltage variation in standby mode, comprising: a power unit, said power unit supplying power; a switching unit, said switching unit being connected with said power unit, wherein said switching unit controls said power unit with voltage changed; a voltage stabilizing unit, said voltage stabilizing unit being connected with said switching unit; a low voltage reset unit, said low voltage reset unit being connected with said switching unit; a micro-controlling unit, said micro control unit being connected with said switching unit; a resume detecting unit, said resume detecting unit comprising a voltage reading unit, said voltage reading unit being connected with said switching unit; a playing unit, said playing unit being connected with said voltage reading unit; and an amplifying unit, said amplifying unit being connected with said playing unit, wherein said voltage reading unit measures a voltage to obtain a resume signal according to a variation of said voltage to resume said micro control unit and to output an audio signal with coordination of said playing unit and said amplifying unit; and an output unit, said output unit being connected with said resume detecting unit, said output unit receiving said audio signal from said amplifying unit and playing a sound with said audio signal, wherein said voltage is monitored to resume according to variation of said voltage and to adjust volume of said sound to maintain said voltage at a certain level.