Buffer circuit having electrostatic discharge protection

Details Buffer circuit having electrostatic discharge protection Buffer circuit having electrostatic discharge protection

2007-08-20

2009-06-02

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S058000, C327S112000, C327S437000, C327S576000, C361S056000

Reexamination Certificate

active

07541840

ABSTRACT:
A buffer circuit includes pull up and pull down circuits configured to selectively pull up and pull down, respectively, a voltage of an input/output pad. The pull up and pull down circuits are connected to separate power supply lines such that a current path from the input/output pad to the pull down circuit through the pull up circuit does not exist when electrostatic discharge is received at the input/output pad.

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United Kingdom Examination Report (dated Dec. 13, 2007) for counterpart British Patent Application No. GB0617597.0 is provided for the purposes of certification under 37 C.F.R. §§ 1.97(e).
British Search Report (dated Apr. 30, 2008) for counterpart British Patent Application No. GB0806766.2 is provided for the purposes of certification under 37 C.F.R. §§ 1.97(e) and 1.704(d).
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Chinese Office Action (dated Jun. 20, 2008) for counterpart Chinese Patent Application No. 200480041393.5.

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