Apparatus and method for level shifting in power-on reset...

Details Apparatus and method for level shifting in power-on reset... Apparatus and method for level shifting in power-on reset...

2007-12-11

2007-12-11

Le, Don (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S081000

Reexamination Certificate

active

11130017

ABSTRACT:
A level shifter for use in a dual power supply circuit operating from a VDD power supply and a VDDH power supply greater than the VDD power supply. The level shifter indicates to a status circuit in the VDDH power supply domain that the VDD power supply is enabled. The level shifter detects when the VDD power supply is on and sets an enable signal to the status circuit. The level shifter also detects when the VDD power supply is off and clears the enable signal to the status circuit.

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