Level shifter control circuit with delayed switchover to...

Details Level shifter control circuit with delayed switchover to... Level shifter control circuit with delayed switchover to...

2005-07-19

2005-07-19

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

C713S310000, C365S189110, C326S080000

Reexamination Certificate

active

06920570

ABSTRACT:
A level shifter control circuit selects one of two level shifters for converting a signal output from a circuit operating on a first power supply for input to a circuit operating on a second power supply. A low-power level shifter is selected when the difference between the two power-supply potentials is comparatively small. A wide-range level shifter is selected when the difference is greater. The switchover from the wide-range level shifter to the low-power level shifter is delayed to allow the power-supply potential difference to diminish to within the operating range of the low-power level shifter, thereby avoiding gaps in the level-shifted signal.

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