Low power single rail input voltage level shifter

Details Low power single rail input voltage level shifter Low power single rail input voltage level shifter

2009-03-13

2010-11-23

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S081000, C327S333000

Reexamination Certificate

active

07839170

ABSTRACT:
One embodiment of the present invention sets forth a technique for shifting the voltage level of signals from a low voltage domain to a high voltage domain, where VDDH is the supply voltage of the high voltage domain and VDDL is the supply voltage of the low voltage domain. A level shifting circuit uses a single input rather than dual rail inputs and does not produce a direct current flow in order to reduce the power consumption. The voltage level shifting circuit may also be used to shift a clock signal since the delays of the rising and falling edges of the clock signal are matched by using a delay element.

REFERENCES:
patent: 4516861 (1985-05-01), Frew et al.
patent: 5422523 (1995-06-01), Roberts et al.
patent: 5952868 (1999-09-01), Gowni et al.
patent: 6252447 (2001-06-01), McClure
patent: 7573314 (2009-08-01), Nagayama
patent: 7652504 (2010-01-01), Campbell et al.
patent: 2003/0080780 (2003-05-01), Okamoto et al.
patent: 2008/0143417 (2008-06-01), Campbell et al.

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