Circuit protecting apparatus and associated method, and...

Details Circuit protecting apparatus and associated method, and... Circuit protecting apparatus and associated method, and...

2009-06-10

2010-10-26

Chang, Daniel D (Department: 2819)

Electronic digital logic circuitry

Security

C326S115000, C716S030000, C726S026000

Reexamination Certificate

active

07821288

ABSTRACT:
A circuit protecting apparatus is provided. The circuit protecting apparatus comprises a selecting module, a routing module, a processing module, and a controlling module. The selecting module selects for each of a plurality of a minimum-sized routing region a routing pattern from a plurality of predetermined routing patterns, and generates an input signal. The routing module then generates the routing comprising the selected routing patterns on a to-be-protected region to form a circuit protecting layer. The routing receives the input signal and outputs an output signal. The processing module decodes the output signal into a restored signal a compares the restored signal with the input signal to generate a comparison result, according to which the controlling module selectively fails a chip.

REFERENCES:
patent: 2010/0122229 (2010-05-01), Lo et al.

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