Slew rate controlled digital output buffer without resistors

Details Slew rate controlled digital output buffer without resistors Slew rate controlled digital output buffer without resistors

2006-09-08

2009-06-09

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S026000, C326S095000, C327S170000

Reexamination Certificate

active

07545175

ABSTRACT:
An output buffer for an IC includes a PMOS transistor having a source coupled to an operating voltage, and an NMOS transistor serially coupled between a drain of the PMOS transistor and a complementary operating voltage. A first driver is coupled to a gate of the PMOS transistor for selectively turning on or off the same. A second driver is coupled to a gate of the NMOS transistor for selectively turning on or off the same. A decoder is coupled to the first and second drivers for controlling the first driver or the second driver to turn on the PMOS transistor or the NMOS transistor at a high rate or a low rate in response to slew rate control signals indicating a slew rate control mode or a non-slew rate control mode.

REFERENCES:
patent: 6970015 (2005-11-01), Chan et al.
patent: 2003/0189446 (2003-10-01), Yoo et al.
patent: 2007/0024328 (2007-02-01), Shin

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