Semiconductor integrated circuit apparatus including supply volt

Details Semiconductor integrated circuit apparatus including supply volt Semiconductor integrated circuit apparatus including supply volt

1993-11-15

1995-07-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327535, 327198, 365226, 36518909, G05F 110, H03K 302, G11C 700

Patent

active

054365864

ABSTRACT:
Disclosed is a DRAM including a power-on reset signal generating circuit for outputting a voltage of a predetermined level for a definite period by utilizing a rise of an external supply voltage, and a supply voltage conversion circuit for lowering the external supply voltage to a constant voltage. In this DRAM, the power-on reset signal generating circuit is driven by the external supply voltage not an output voltage of the supply voltage conversion circuit. The output voltage of the supply voltage conversion circuit is applied to various internal circuits including smaller-scale MOS transistors, to drive these internal circuits. Since the supply voltage conversion circuit often includes circuit components with a large time constant in order to decrease power consumption, the output voltage of the supply voltage conversion circuit rises rather slowly than the external supply voltage. However, the power-on reset signal generating circuit receives the external supply voltage as a driving voltage and hence immediately outputs a normal one-shot pulse in response to the supply of power to the DRAM.

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