Self-refresh oscillator

Details Self-refresh oscillator Self-refresh oscillator

1999-10-19

2000-11-28

Dinh, Son T.

Static information storage and retrieval

Read/write circuit

Data refresh

365211, G11C 700

Patent

active

061544086

ABSTRACT:
A self-refresh oscillator for a semiconductor memory device includes a control signal generater sensing a variation of a potential of an inputted signal and generating a write operation control signal having a predetermined pulse width in accordance with an enable signal enabled when a self-refresh mode starts, a cell emulator feeding back the write operation control signal, performing a data write operation, and discharging an output terminal potential in accordance with a temperature variation, and a comparator selectively enabled according to the enable signal, comparing a first input signal which is an output signal from the cell emulator with a second input signal which is a reference potential, and inputting the output signal to a first input terminal of the control signal generater. As a result, the self-refresh oscillator senses the data loss of the memory cell resulting from the leakage current, and controls a refresh period, thereby minimizing the power consumption in the standby mode.

REFERENCES:
patent: 4982369 (1991-01-01), Tatematsu
patent: 5299168 (1994-03-01), Kang
patent: 5801982 (1998-09-01), Blodgett
patent: 5903506 (1999-05-01), Blodgett

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