Power-on-reset circuit with output reset to ground voltage...

Details Power-on-reset circuit with output reset to ground voltage... Power-on-reset circuit with output reset to ground voltage...

2007-04-24

2008-08-26

Richards, N. Drew (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S142000, C327S198000

Reexamination Certificate

active

07417476

ABSTRACT:
A power-on reset circuit includes a first circuit arranged between a high voltage supply terminal (VDD) and a low voltage supply terminal (VSS), wherein the first circuit is configured to output a low-voltage reset signal at an output node (PORB) when VDD is powered up and to output a high voltage signal at the node PORB after the VDD reaches a predetermined voltage during power up; a second circuit configured to set the node PORB to a low voltage after VDD is powered off; and a third circuit configured to provide a supply voltage at a node DV to the second circuit. The supply voltage is lower than the voltage of VDD by approximately one diode voltage.

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