Programmable Generator Producing Virtual Arbitrary Test Patterns



  1. The suggested hybrid plan efficiently combines test compression with LBIST, where both techniques could work synergistically to provide top quality tests. It is composed of a straight line finite condition machine driving a suitable phase shifter, and it arrives with numerous features permitting this product to create binary sequences with preselected toggling (PRESTO) activity. We introduce a means to instantly select several controls from the generator offering simple and easy, precise tuning. This paper describes a minimal-power (LP) generator able to creating pseudorandom test designs with preferred toggling levels that has been enhanced fault coverage gradient in comparison using the best-to-date built-in self-test (BIST)-based pseudorandom test pattern machines. Exactly the same strategy is subsequently used to deterministically advice the generator toward test sequences with enhanced fault-coverage-to pattern-count ratios. In addition, this paper proposes an LP test compression way in which enables shaping the exam power envelope inside a fully foreseeable, accurate, and versatile fashion by adapting the PRESTO-based logic BIST (LBIST) infrastructure. Experimental results acquired for industrial designs illustrate the practicality from the suggested test schemes and therefore are reported herein.

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