Integrated circuit

Details Integrated circuit Integrated circuit

2005-05-17

2005-05-17

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000

Reexamination Certificate

active

06894545

ABSTRACT:
An integrated circuit comprising a circuit block whose power supply is controlled by waiting operation, is supplied which is able to prevent the occurrence of penetrating electricity caused by unstable signals output from the circuit block whose power supply was broken. In the integrated circuit, a mask signal is set at “L” level before a power in the circuit block is broken, a latch circuit formed by a NAND and an inverter keeps a node in “L” state, then when the power supply is broken and drops into “L” level, the output signal of the NAND is fixed in “H” level. Thus, from the circuit block, even if a unstable mask signal is output, the node keeps in “L” level, so that gate circuits become off.

REFERENCES:
patent: 6204706 (2001-03-01), Horvath
patent: 05-075064 (1993-03-01), None

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