Semiconductor device having supply voltage deboosting circuit

Details Semiconductor device having supply voltage deboosting circuit Semiconductor device having supply voltage deboosting circuit

1995-08-25

1997-05-06

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327407, 327530, 327535, 327525, 327545, 365226, G05F 302

Patent

active

056274939

ABSTRACT:
The semiconductor device comprises: an internal supply voltage deboosting circuit for inputting an external supply voltage, deboosting the inputted external supply voltage, and outputting a deboosted voltage as an internal supply voltage; a first control circuit for deactivating the internal supply voltage deboosting circuit when the external supply voltage is lower than a predetermined value; and a second control circuit for outputting the external supply voltage as the internal supply voltage when the external supply voltage is lower than the predetermined value. When the external supply voltage is lower than a predetermined value, since the internal supply voltage deboosting circuit is deactivated by the first control circuit, the current consumption can be reduced. Further, since the external supply voltage is outputted as the internal supply voltage by the second control circuit, the deboosting operation is not required. The device is usable for different external supply voltages in spite of the same circuit configuration, while preventing the operational margin from being deteriorated.

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