Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2007-10-23
2007-10-23
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S143000, C713S320000
Reexamination Certificate
active
10995431
ABSTRACT:
A power-off detection device is formed without use of a photo coupler, which is expensive and occupies a relatively large area. The power-off detection device rectifies AC power, provided as external input power from a power supply device, into DC power, detects the power-off of the external input power from the power supply device as provided to an electronic appliance, provides a power-off detection signal to central control means of the electronic appliance, and enables the central control means to prepare for the power-off, thereby reducing manufacturing cost of the power supply device, and achieving miniaturization thereof.
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Bushnell , Esq. Robert E.
Hitunen Thomas J.
Wells Kenneth B.
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