An ESD protection circuit for a transistor having a drain and source 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...http://www.google.com/patents/US7616414?utm_source=gb-gplus-sharePatent US7616414 - ESD protection circuit for high speed signaling including T/R switches
