Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Patent
1997-07-15
1998-07-21
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
327256, 327259, H03K 513
Patent
active
057839603
ABSTRACT:
A remote clock signal generation means is provided which allows a plurality of clock signals to be generated remotely at the "leaf" level thereby removing the need to have multiple clock signals at the system, or "tree" level. More particularly, this system is designed for use in an LBIST circuit featuring LSSD master-slave clock control. This disclosure teaches a clock control method and structure in which the master and slave clocks are generated directly from the system clock after the clock powering logic to thereby avoid intrusion or modification effects associated with logical manipulation of the clock signals.
REFERENCES:
patent: 4839604 (1989-06-01), Tanahashi
patent: 4877974 (1989-10-01), Kawai et al.
patent: 5130568 (1992-07-01), Miller et al.
patent: 5136185 (1992-08-01), Fleming et al.
patent: 5175447 (1992-12-01), Kawasaki et al.
patent: 5463338 (1995-10-01), Yurash
Callahan Timothy P.
International Business Machines - Corporation
Lam T. T.
Walsh Robert A.
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