Bidirectional input/output cells

Details Bidirectional input/output cells Bidirectional input/output cells

2005-03-22

2005-03-22

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S083000, C326S086000, C326S090000

Reexamination Certificate

active

06870399

ABSTRACT:
A bi-directional input/output (IO) cell for transmitting and receiving data signals simultaneously over a single line. The bidirectional IO cell having an IO node adapted to connect to the line. A driver has an output connected to the line and an input for receiving a core output signal. A first differential amplifier has a first input connected to the IO node and a second input connected to a high voltage reference circuit. A second differential amplifier has a first input connected to the IO node and a second input connected to a low voltage reference circuit.

REFERENCES:
patent: 5097144 (1992-03-01), Chang et al.
patent: 5325355 (1994-06-01), Oprescu et al.
patent: 6127849 (2000-10-01), Walker
patent: 6304106 (2000-10-01), Cecchi et al.
patent: 6452428 (2002-09-01), Mooney et al.
patent: 6690196 (2004-02-01), Cecchi et al.
“A 900 Mb/s Bi-directional Signaling Scheme”, by Mooney et al., IEEE Journal of Solid-State Circuits, vol. 30, No. 12, Dec. 1995.
“3.2 GHz 6.4 Gb/s per Wire Signaling in 0.18 micro meter CMOS”, by M. Haycock and R. Mooney, published in the Digest of Technical Papers presented in the IEEE International Solid-State Circuits Conference Feb. 5-6, 2001 pp. 62-63 and 430.

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