Semiconductor device including a voltage monitoring circuit

Details Semiconductor device including a voltage monitoring circuit Semiconductor device including a voltage monitoring circuit

2005-03-22

2005-03-22

Le, Vu A. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Including reference or bias voltage generator

C365S189070

Reexamination Certificate

active

06870778

ABSTRACT:
An semiconductor device includes a voltage-decreasing regulator which converts a source voltage into an output voltage in accordance with a control signal, the regulator supplying the output voltage to an internal module via a power line. An analog-to-digital converter converts the output voltage received from the power line, into an output signal indicating a value of the output voltage. A voltage monitoring circuit has a control register holding a value predetermined for a selected operational mode. The voltage monitoring circuit generates the control signal based on a result of comparison between the value indicated by the output signal of the converter and the value held by the control register, and outputs the control signal to the regulator so that the regulator supplies the output voltage, adjusted to an optimal output voltage for the selected operational mode by the control signal, to the internal module.

REFERENCES:
patent: 5046052 (1991-09-01), Miyaji et al.
patent: 6388432 (2002-05-01), Uchida
patent: 6608997 (2003-08-01), Fischer et al.
patent: 2-40195 (1990-02-01), None
patent: 2001-16770 (2001-01-01), None

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