Power detecting device, power supply device using the same...

Details Power detecting device, power supply device using the same... Power detecting device, power supply device using the same...

2011-06-28

2011-06-28

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

07969211

ABSTRACT:
A power detecting device, a power supply device using the same, and a reference voltage generator are provided. The power detecting device adapted to detect a power voltage of a display device includes a bandgap voltage generating circuit, a voltage regulating circuit, and a power-on reset circuit. The bandgap voltage generating circuit provides a reference voltage via an output terminal thereof. The voltage regulating circuit and the power-on reset circuit are coupled to the output terminal of the bandgap voltage generating circuit. When the power voltage doesn't reach a threshold voltage, the voltage regulating circuit increases the reference voltage referred by the power-on reset circuit. When the power voltage reaches the reference voltage, the power-on reset circuit generates a reset signal to reset the display device. Therefore, when the power voltage doesn't reach a stable, the power-on reset circuit will not be incorrectly started by increasing the reference voltage.

REFERENCES:
patent: 7589572 (2009-09-01), Frulio et al.
patent: 2009/0002037 (2009-01-01), Ryoo

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