Semiconductor potential supply device and semiconductor memory a

Details Semiconductor potential supply device and semiconductor memory a Semiconductor potential supply device and semiconductor memory a

1996-06-27

1999-04-13

Nelms, David

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327525, G05F 320

Patent

active

058942440

ABSTRACT:
A resistor connected in series with a source of external supply potential and a transistor circuit. The transistor circuit comprises a plurality of MOS transistors each of whose drain and gate are connected together, and is grounded. This transistor circuit detects whether an external supply potential is below or above a specific value. When the external supply potential is detected as being below the specific value, another MOS transistor connected to the source of external supply potential is made to conduct, and the external supply potential is supplied to a semiconductor memory circuit without voltage step-down. However, when the external supply potential is detected as being above the specific value, the external supply potential is stepped down through the other MOS transistor, and supplied to the semiconductor memory circuit. An internal supply potential is supplied to a semiconductor memory circuit device in a specific range even if the external supply potential fluctuates.

REFERENCES:
patent: 4833342 (1989-05-01), Kiryu et al.
patent: 5258947 (1993-11-01), Sourgen
patent: 5424655 (1995-06-01), Chua
patent: 5729155 (1998-03-01), Kobatake

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