Nxp B.v.

Arjan Mels

Pim Theo Tuyls

Maarten Vertregt

Hans De Jong

Peter Christiaans

Mathias Wagner

Dongyong Zhu

Frans J List

Frank Zachariasse

A surge protection circuit includes a DC trigger circuit that generates a trigger signal when a surge pulse occurs, and a current conducting unit, coupled to the DC trigger circuit, that generates a first clamp voltage as an output voltage of the surge protection circuit and conducts surge currents to ground in response to the trigger signal. The DC trigger circuit includes a surge detection circuit and a first amplification circuit. The surge detection circuit detects if a surge pulse occurs, and triggers the first amplification circuit to generate the trigger signal when the surge detection circuit detects a surge pulse.

Surge protection circuit

It is described a method for providing an electronic key within an integrated circuit () including both a volatile memory () and a non-volatile memory (). The described comprises starting up the integrated circuit (), reading the logical state of predetermined data storage cells () assigned to the volatile memory (), which data storage cells () are characterized that with a plurality of start up procedures they respectively adopt the same logical state, and generating an electronic key by using the logical state of the predetermined data storage cells (). Preferably, the predetermined data storage cells () are randomly distributed within the volatile memory (). It is further described an integrated circuit () for providing an electronic key. The integrated circuit () comprises a volatile memory () comprising predetermined data storage cells (), which are characterized that with a plurality of start up procedures they respectively adopt the same logical state, and a non-volatile memory () having information stored upon regarding the predetermined data storage cells (). Thereby, the electronic key is defined by the corresponding logical states of the predetermined data storage cells ().

Security storage of electronic keys within volatile memories

Growing community of inventors

Nijmegem, Netherlands

Arjan Mels