Multifunctional scan flip-flop

Details Multifunctional scan flip-flop Multifunctional scan flip-flop

1991-04-19

1992-12-29

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072722, 307465, 307279, 307452, H03K 1900, H03K 3289

Patent

active

051754479

ABSTRACT:
A multifunctional scan flip-flop having a normal function and a scan function, including: a first latch used for a normal function for latching input data applied to a data input terminal during a normal function operation, the latch operation being carried out synchronous with a clock applied to a clock input terminal; a second latch used for a scan function for holding scan data applied to a scan data input terminal during a scan function operation; and a delay circuit for delaying one of the input data and the clock relative to the other, the delay operation being carried out in accordance with the H/L level of the scan data held by the second latch.

REFERENCES:
patent: 4540903 (1985-09-01), Cooke et al.
patent: 4779009 (1988-10-01), Tsunoi et al.
patent: 4961013 (1990-10-01), Obermeyer, Jr. et al.
patent: 5003204 (1991-03-01), Cushing et al.

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