I/O buffer with wide range voltage translator

Details I/O buffer with wide range voltage translator I/O buffer with wide range voltage translator

2006-02-28

2006-02-28

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S323000

Reexamination Certificate

active

07005913

ABSTRACT:
In accordance with an aspect of an input/output device for providing fast translation between differential signals from a core of an integrated circuit and higher voltage signals that are external to the core, an I/O buffer includes low voltage devices for receiving core input signals, a cascode stage for setting a bias between the input devices and an output stage, and an output stage including a current mirror for providing a translated external output. Another aspect of the invention further includes a feedback path to cut off the current mirror to prevent static current and a keeper device to maintain an output level after cut off of the current mirror.

REFERENCES:
patent: 6184716 (2001-02-01), Depetro et al.
patent: 6188269 (2001-02-01), Hauser
patent: 6288575 (2001-09-01), Forbes
patent: 6353350 (2002-03-01), Bedarida et al.
patent: 6781445 (2004-08-01), Feldman
patent: 6801064 (2004-10-01), Hunt et al.
patent: 6836148 (2004-12-01), Pullen et al.
patent: 2004/0061525 (2004-04-01), Tamaki

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