Output buffer with low-voltage devices to driver...

Details Output buffer with low-voltage devices to driver... Output buffer with low-voltage devices to driver...

2006-05-16

2006-05-16

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Tri-state

C326S057000, C326S058000, C326S068000, C326S080000

Reexamination Certificate

active

07046036

ABSTRACT:
An output buffer circuit with low-voltage devices to driver high-voltage signals for PCI-X applications is proposed. Because power supply voltage of PCI-X is at 3.3V, the high-voltage gate-oxide stress is a serious problem to design PCI-X I/O circuit in a 0.13 μm 1V/2.5V CMOS process with only low-voltage gate oxide. This proposed output buffer circuit can be operated at 133 MHz in 3.3V PCI-X environment without causing high-voltage gate-oxide reliability problem. In this design, the circuit is implemented in a 0.13 μm 1V/2.5V CMOS process and the output signal swing can be 3.3V. Besides, a level converter that converts 0V˜1V voltage swing to 1V˜3.3V voltage swing is also presented.

REFERENCES:
patent: 6201428 (2001-03-01), Clark
patent: 6388475 (2002-05-01), Clark et al.

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