Other

Cylink Corporation

Lidong Chen

Howard C Kirsch

Charles S Williams

Jason Tzu-Jung Su

A switch level simulation system includes a netlister, a cross-coupled device detector, a cross-coupled device transformer and a switch level simulator. The user provides a circuit a design to the netlister, which generates a netlist of the circuit. The cross-coupled device detector searches the netlist to find all of the cross-coupled devices in the circuit design. The cross-coupled device detector also determines whether the cross-coupled device has a &ldquo;rail&rdquo; node directly connected an external voltage source line. The cross-coupled device transformer transforms each cross-coupled device having a rail node into a transformed cross-coupled device by inserting in the netlist a device at the rail node mirroring the enable device. The mirror device allows the transformed cross-coupled device to provide a high impedance state to emulate the meta-stable state of the cross-coupled device during switch level simulation. The switch level simulator then performs simulations using the netlist with the transformed cross-coupled devices. This technique avoids the need to construct behavioral models of the cross-coupled devices, significantly reducing the engineering resources needed to model cross-coupled devices, while maintaining the accuracy of the switch level simulation.

Switch level simulation with cross-coupled devices

A public key sterilization scheme for thwarting possible attacks based on choosing malicious public keys. A first user sends public key information to a certificate authority. The certificate authority manipulates the public key information, and sends certified version of the public key information to the first user. The first user verifies the certified key, and calculates a second private key.

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Sunnyvale, CA, United States of America

Lidong Chen