Output or bidirectional buffer circuit which tolerates an...

Details Output or bidirectional buffer circuit which tolerates an... Output or bidirectional buffer circuit which tolerates an...

2007-05-15

2007-05-15

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S086000

Reexamination Certificate

active

11072434

ABSTRACT:
A semiconductor integrated circuit includes a first transistor coupled between the electrical source terminal and the output terminal. The first transistor provides an output signal based on a power supply voltage to the output terminal. The semiconductor integrated circuit further includes a second transistor coupled with a control electrode of the first transistor and the output terminal. The semiconductor integrated circuit still further includes a voltage adjusting circuit coupled between the output terminal and a control electrode of the second transistor. The voltage adjusting circuit turns ON the second transistor when the output terminal receives an external voltage which is higher than the power supply voltage.

REFERENCES:
patent: 5973511 (1999-10-01), Hsia et al.
patent: 6269042 (2001-07-01), Kawano et al.
patent: 6282456 (2001-08-01), Kim
patent: 6359315 (2002-03-01), Pillay et al.
patent: 6927602 (2005-08-01), Ker et al.
patent: 10163852 (1998-06-01), None
patent: 20000196436 (2000-07-01), None

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