Semiconductor integrated circuit and its reset method

Details Semiconductor integrated circuit and its reset method Semiconductor integrated circuit and its reset method

2005-04-12

2005-04-12

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

06879193

ABSTRACT:
In a circuit block110to be an object of power-off, voltage detecting circuits130and134are disposed near power supply terminals140and142, respectively, and voltage detecting circuits132and136are disposed at given positions far from the terminals140and142, respectively, on power lines141and143of two electric-supply systems. The voltage detecting circuits are each made of MOS transistors only. At turning on the power from a power supply circuit150again, after all the voltage detecting circuits have detected arrival of power-supply voltages at a predetermined potential, a reset signal generating circuit160stops the input of a reset signal to the circuit block110.Accordingly, since the reset state is stopped after the arrival of the power-supply voltages at the predetermined voltage, a semiconductor integrated circuit is initialized normally. This provides a semiconductor integrated circuit capable of generating a power-on reset signal appropriately.

REFERENCES:
patent: 6335646 (2002-01-01), Nagatomo
patent: 6469552 (2002-10-01), Ohbayashi et al.
patent: 6556057 (2003-04-01), McClure
patent: 1-269114 (1989-10-01), None
patent: 6-303117 (1994-10-01), None
patent: 11-027121 (1999-01-01), None

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