ESD protection circuit for high speed signaling including a...

Details ESD protection circuit for high speed signaling including a... ESD protection circuit for high speed signaling including a...

2011-05-17

2011-05-17

Patel, Dharti H (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S118000

Reexamination Certificate

active

07944659

ABSTRACT:
An ESD protection circuit for a switch coupled to high-speed signaling pins of an integrated circuit includes a first string of clamping elements and a second string of clamping elements. The first string of clamping elements has a collective capacitance less than the capacitance of a single clamping element. The first string of clamping elements is operably coupled to the drain and source of the transistor and conducts when a first polarity ESD voltage is applied to the high-speed pins. The second string of clamping elements has a collective capacitance less than the capacitance of one clamping element. The second string of clamping elements is operably coupled to the drain and source of the transistor and conducts when a second polarity ESD voltage is applied to the high speed signaling pins.

REFERENCES:
patent: 5719737 (1998-02-01), Maloney
patent: 5808342 (1998-09-01), Chen et al.
patent: 6275089 (2001-08-01), Song et al.
patent: 7616414 (2009-11-01), Marholev

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