Address transition detection circuit

Details Address transition detection circuit Address transition detection circuit

1996-08-23

1998-03-31

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327228, 327176, 327 26, 3652335, H03K 3284

Patent

active

057342822

ABSTRACT:
An improved address transition detection circuit prevents malfunctions of a memory by generating an address transition detection signal having a certain pulse width regardless of the width of a pulse of an address signal inputted to a memory. The circuit includes a NOR-gate for NORing an address signal and a chip selection signal, which are externally applied thereto. A level maintaining unit maintains a level of a signal outputted from the NOR-gate for a predetermined time, in accordance with first and second latch signals and first and second delay signals, to output first and second level maintaining signals of different levels. A latch latches the first and second level maintaining signals outputted from the level maintaining unit and outputs first and second latch signals. First and second signal delay units delay first and second latch signals outputted from the latch for a predetermined time and output first and second delay signals. A signal output unit outputs an address transition detection signal, in accordance with first and second latch signals and first and second delay signals.

REFERENCES:
patent: 4355283 (1982-10-01), Ott
patent: 5625604 (1997-04-01), Kim et al.

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