Electronic digital logic circuitry – Interface – Logic level shifting
Reexamination Certificate
2006-05-03
2008-11-11
Barnie, Rexford (Department: 2819)
Electronic digital logic circuitry
Interface
Logic level shifting
C326S083000, C327S333000
Reexamination Certificate
active
07449916
ABSTRACT:
A voltage level shift circuit is provided. The circuit includes an input buffer unit, a level shift unit and a voltage stabilizing capacitor. The input buffer is coupled between a first voltage source and a first ground terminal. The level shift unit is coupled between a second voltage source and a second ground terminal. An input terminal of the level shift unit is coupled to an output terminal of the input buffer unit. The voltage stabilizing capacitor is coupled between the first voltage source and the second ground terminal. When a state transition occurs in the level shift unit, the voltage stabilizing capacitor maintains a voltage difference between the output terminal of the input buffer unit and the second ground terminal.
REFERENCES:
patent: 6522323 (2003-02-01), Sasaki et al.
patent: 6710638 (2004-03-01), Morikawa
patent: 6856163 (2005-02-01), Sutardja
patent: 2005/0024088 (2005-02-01), Lee
patent: 2005/0270066 (2005-12-01), Kozawa
Bu Lin-Kai
Chang Yu-Jui
Chen Chien-Ru
Chen Ying-Lieh
Barnie Rexford
Himax Technologies Limited
J.C. Patents
White Dylan
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