High speed voltage level shifter circuits

Details High speed voltage level shifter circuits High speed voltage level shifter circuits

2008-04-22

2008-04-22

Barne, Rexford (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S068000, C326S083000

Reexamination Certificate

active

07362137

ABSTRACT:
A level shifter circuit for shifting a voltage level of a logic signal from a first voltage to a second voltage includes an input stage operating in a domain of a first voltage supply that receives an input signal. The input stage includes a first inverter receiving the input signal and providing a first inverted signal. An output voltage level shifting stage operating in a domain of a second voltage supply is coupled to the input stage and providing an output signal having a voltage level corresponding to the second voltage supply domain and a logic value corresponding to the input signal. The level shifter circuit enables voltage level shifting a logic signal from a high to a low operating voltage, or from a low to a high operating voltage. The level shifter circuit enables high frequency operation, providing both fast switching and low capacitance.

REFERENCES:
patent: 6838905 (2005-01-01), Doyle
patent: 7102389 (2006-09-01), Chen et al.
patent: 7129751 (2006-10-01), Jahan et al.
patent: 7176740 (2007-02-01), Tachibana et al.
patent: 7274209 (2007-09-01), Reinschmidt

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