A variable observation time method for testing delay faults
DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
Design-for-testability for path delay faults in large combinatorial circuits using test-points
DAC '94 Proceedings of the 31st annual Design Automation Conference
Too much delay fault coverage is a bad thing
Proceedings of the IEEE International Test Conference 2001
Proceedings of the 41st annual Design Automation Conference
On Generating Pseudo-Functional Delay Fault Tests for Scan Designs
DFT '05 Proceedings of the 20th IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems
Constraint extraction for pseudo-functional scan-based delay testing
Proceedings of the 2005 Asia and South Pacific Design Automation Conference
Generation of Functional Broadside Tests for Transition Faults
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
A robust pulsed flip-flop and its use in enhanced scan design
ICCD'09 Proceedings of the 2009 IEEE international conference on Computer design
Built-in generation of multicycle functional broadside tests with observation points
ACM Transactions on Design Automation of Electronic Systems (TODAES)
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Functional broadside tests were defined to address overtesting that may occur due to high peak current demands when tests for delay faults take the circuit through states that it cannot visit during functional operation (unreachable states). The fault coverage achievable by functional broadside tests is typically lower than the fault coverage achievable by (unrestricted) broadside tests. A solution to this loss in fault coverage in the form of observation point insertion is described. Observation points do not affect the state of the circuit. Thus, functional broadside tests retain their property of testing the circuit using only reachable states to avoid overtesting due to high peak current demands. However, the extra observability allows additional faults to be detected. A procedure for observation point insertion to improve the coverage of transition faults is described. Experimental results are presented to demonstrate that significant improvements in transition fault coverage by functional broadside tests is obtained.