Circuit tester

Details Circuit tester Circuit tester

1985-12-23

1988-02-23

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Plural, automatically sequential tests

371 27, G01R 3128

Patent

active

047273127

ABSTRACT:
A tester (10) for testing an electronic circuit (22) has test terminals (18a-d) that are to be connected to the terminals (20a-d) of the circuit under test. The tester terminals (18a-d) are placed in the states required for testing by formatter circuits (32a-d) in accordance with state codes generated by state-code generators (24a-d). However, the state-code generators (24a-d) are not required to generate every code as quickly as those codes are needed by the formatters (32a-d), because first-in, first-out memory stacks (30a-d) are interposed between the state-code generators (24a-d) and the formatters (32a-d). This permits the state-code generators (24a-d) to employ relatively slow--and thus relatively inexpensive--memories (26).

REFERENCES:
patent: 4102491 (1978-07-01), De Vito et al.
patent: 4339819 (1982-07-01), Jacobson
patent: 4433414 (1984-02-01), Carey
patent: 4450560 (1984-05-01), Conner
patent: 4451918 (1984-05-01), Gillette
patent: 4493079 (1985-01-01), Hughes, Jr.
patent: 4517661 (1985-05-01), Graf et al.
patent: 4598245 (1986-07-01), Groves et al.
patent: 4622647 (1986-11-01), Sagnard et al.
patent: 4642797 (1987-02-01), Hoberman

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