Semiconductor memory device comprising address transition detect

Details Semiconductor memory device comprising address transition detect Semiconductor memory device comprising address transition detect

1996-05-23

1998-02-03

Popek, Joseph A.

Static information storage and retrieval

Addressing

Sync/clocking

365194, G11C 800

Patent

active

057152128

ABSTRACT:
In an address transition detecting circuit, signal conversion detecting circuits output complementary time difference signals which are inverted in response to potential level changes of corresponding address lines respectively. Waveform shaping one-shot pulse generating circuits receive corresponding complementary time difference signals and output one-shot pulse signals of prescribed time widths. A waveform composing circuit outputs an ATD signal of a prescribed pulse length in response to activation of any one-shot pulse signal. Therefore, the lengths of the one-shot pulses outputted from the waveform shaping one-shot pulse generating circuits remain unchanged even if the potential level of any signal line is abruptly converted, and an ATD signal of a constant pulse length is regularly outputted.

REFERENCES:
patent: 5056064 (1991-10-01), Iwahashi et al.
patent: 5305284 (1994-04-01), Iwase
patent: 5319607 (1994-06-01), Fujii et al.

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