Artificial random-number pattern generating circuit

Details Artificial random-number pattern generating circuit Artificial random-number pattern generating circuit

1992-01-10

1994-07-19

Nguyen, Long T.

Boots, shoes, and leggings

G06F 102

Patent

active

053315812

ABSTRACT:
An artificial random-number pattern generating circuit has a plurality of flip-flops each having a set signal input terminal and a clock signal input terminal; a plurality of selectors each of which forwards its output to the corresponding flip-flop and receives a first operation mode signal and/or a second operation mode signal; and an exclusive logical OR gate. The artificial random-number pattern generating circuit functions in three different ways, that is, as an artificial random-number pattern generator, a boundary scanning buffer or an input buffer, in accordance with the combinations of the first and second operation mode signals. The circuit can make not only a diagnosis of failure in the internal circuit of the large-scale integration (LSI) but also overall tests including those for input and output buffer circuits of the mounted LSI chip on a board or those for external wirings for the LSI.

REFERENCES:
patent: 3875377 (1975-04-01), Hirsch
patent: 4377757 (1983-03-01), Konemann et al.
patent: 4860236 (1989-08-01), McLeod et al.
patent: 5105376 (1992-04-01), Pedron

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