Symmetrically operating single-ended input buffer devices...

Static information storage and retrieval – Read/write circuit – Having particular data buffer or latch

Reexamination Certificate

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C365S063000

Reexamination Certificate

active

07859916

ABSTRACT:
Embodiments are described including those pertaining to an input buffer having first and second complementary input terminals. One such input buffer has a symmetrical response to a single input signal applied to the first input terminal by mimicking the transition of a signal applied to the second input terminal in the opposite direction. The aforementioned input buffer includes two amplifier circuits structured to be complementary with respect to each other. Each of the amplifier circuits includes a first transistor having a first input node that receives an input signal transitioning across a range of high and low voltage levels, and a second transistor having a second input node that receives a reference signal. The first input node is coupled to the second transistor through a capacitor that charges and discharges the drain of the second transistor responsive to the input signal transitioning to mimic the second input node transitioning in the direction opposite to the transition of the input signal, while the reference signal at the second input node is maintained at a constant voltage level.

REFERENCES:
patent: 5432746 (1995-07-01), Guedj
patent: 6373753 (2002-04-01), Proebsting
patent: 6847582 (2005-01-01), Pan
patent: 7206234 (2007-04-01), Pan et al.
patent: 2003/0095456 (2003-05-01), Rickes et al.
patent: 2003/0133351 (2003-07-01), Hidaka
patent: 2007/0046373 (2007-03-01), Staples et al.

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