Single supply level shifter

Details Single supply level shifter Single supply level shifter

2006-03-07

2006-03-07

JeanPierre, Peguy (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S068000

Reexamination Certificate

active

07009424

ABSTRACT:
A level shifter that shifts a low supply voltage input signal to a higher supply voltage output signal includes a first unit and a second unit. The first unit is connected to a high power supply voltage source and receives the input signal. The first unit acts as a startup circuit such that when the level shifter is switched on, the first unit discharges an output node if the input signal is a logic low, and when the input signal is a logic high, the first unit charges a control node to the voltage of the input signal. The second unit is connected to the first unit and the high power supply voltage source, and also receives the input signal. The second unit shifts the input signal to the higher supply voltage output signal. The level shifter operates only at the high power supply voltage.

REFERENCES:
patent: 4150308 (1979-04-01), Adlhoch
patent: 6819159 (2004-11-01), Lencioni
patent: 6850090 (2005-02-01), Aoki
patent: 2003/0001655 (2003-01-01), Jeong
patent: 2003/0098711 (2003-05-01), Tsuboi et al.

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