Clock switching : a new design for current test (DcT) method for dynamic logic circuits

Rosing, R. and Richardson, A. M. D. and Kerkhoff, A. and Acosta, A. (1998) Clock switching : a new design for current test (DcT) method for dynamic logic circuits. In: IDDQ Testing, 1998. Proceedings. 1998 IEEE International Workshop on :. IEEE, pp. 20-25. ISBN 0818691913

Abstract

Using an Iddq test methodology on circuits with dynamic logic tends to be problematic, mainly due to charge leakage related problems. A new Design for current Testability (DcT) method has been developed, which overcomes these problems by switching the circuit into a static mode during test. The method referred to as clock switching is applicable to both domino logic and True Single-Phase Clock (TSPC) circuits. This paper shows that this technique can lead to higher levels of Iddq testability and a reduced test vector set for the detection of bridging faults