Adaptor circuit for power supply
AssigneesHon Hai Precision Industry Co., Ltd., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
InventorHAI-QING ZHOU
Life of this patent
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Abstract
A adaptor circuit for a power supply includes a first comparison circuit, a timing circuit; and a second comparison circuit. An input of the first comparison circuit is electrically connected to a PS_ON terminal. The first comparison circuit includes a diode. An input of the second comparison circuit is electrically connected to the diode of the first comparison circuit via the timing circuit. When the PS_ON signal is powered on, the diode is off, and the timing circuit charges up in a predetermined time, and the second comparison circuit outputs a PWR_GOOD signal after the predetermined time. When the PS_ON signal is powered off, the diode turns on, and the timing circuit discharges, so the second comparison circuit stops outputting a PWR_GOOD signal.
Claims9
An adaptor circuit for a power supply generating a PS_ON signal, the adaptor circuit comprising:
- a first comparison circuit, an input of the first comparison circuit being adapted for electrically connecting the PS_ON signal, the first comparison circuit comprising a diode;
- a timing circuit;
- and
- a second comparison circuit, an input of the second comparison circuit being electrically connected to the diode of the first comparison circuit via the timing circuit,
- when the PS_ON signal being powered on, the diode is off, and the timing circuit charges up in a predetermined time, and the second comparison circuit outputting a PWR_GOOD signal after the predetermined time to indicate the power supply being properly set;
- when the PS_ON signal being powered off, the diode turns on, the timing circuit discharges, and the second comparison circuit stop outputting the PWR_GOOD signal.
Dependencies are inferred from the claim text.