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Low-cost DC built-in self-test of linear analog circuits using checksums

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3 Author(s)
Chatterjee, A. ; Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Kim, B. ; Nagi, N.

DC testing of analog circuits is inexpensive compared to AC testing and provides high coverage of many fault classes including some that are not detected by AC tests. It is also particularly effective in detecting catastrophic failures such as line opens and shorts. In this paper, we present an efficient low-cost built-in self-test (BIST) methodology for linear analog circuits that is targeted towards faults that can be detected with DC tests. The methodology is based on the use of checksum encodings of matrix representations of the DC transfer function of the circuit under test (CUT). A small amount of circuitry called the checking circuitry is appended to the CUT for the purpose of on-chip fault detection. The size of this circuitry is limited to one extra op-amp irrespective of the size of the CUT. In test mode, DC stimulus is applied to the CUT via low-cost on-chip BIST circuitry. The presence of a nonzero signal at the output of the checking circuit indicates the presence of a fault

Published in:

VLSI Design, 1996. Proceedings., Ninth International Conference on

Date of Conference:

3-6 Jan 1996