Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1975-07-31
1977-03-22
Rolinec, R. V.
Electricity: measuring and testing
Plural, automatically sequential tests
G01R 1512
Patent
active
040139514
ABSTRACT:
Circuit testing apparatus includes a pulse oscillator providing clock pulses, a binary counter for counting the clock pulses to successively generate binary numbers, and a translator which translates the successive binary numbers into a series of test patterns. The test patterns include a series of input bit patterns used to energize the input leads of an electronic logic circuit under test and a series of output binary digits, each of which corresponds to the respective one of the input patterns. Each of the binary digits is compared with an output from the logic circuit under test. When the circuit tested is not functioning as prescribed for a particular set of input pattern, a noncoincidence signal will be produced to disable the binary counter in order to permit the test operator to register the test mode in which the trouble occurred. The binary counter may be enabled manually after registration to complete the prescribed number of tests. The presence of a noncoincidence signal is represented by binary digits and stored in a shift register. The stored bits are translated into information indicating the location of a circuit trouble, if any.
REFERENCES:
patent: 3219927 (1965-11-01), Topp, Jr. et al.
patent: 3784907 (1974-01-01), Eichelberger
patent: 3883801 (1975-05-01), Hess
patent: 3916306 (1975-10-01), Patti
Ezoe Mitsuhiko
Ozawa Hiroshige
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Nissan Motor Co,. Ltd.
Rolinec R. V.
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