Semiconductor memory circuit

Static information storage and retrieval – Systems using particular element – Capacitors

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Details

365203, G11C 1140

Patent

active

044583362

ABSTRACT:
A semiconductor memory circuit is disclosed, which includes: word lines, bit lines and memory cells at each cross point of the word lines and the bit lines. Each memory cell including a capacitor, having a first electrode and a second electrode, and a transfer-gate transistor connected in series with the capacitor at the first electrode thereof. The memory circuit also includes pre-charge circuits each charging one corresponding bit line to a predetermined pre-charge voltage level by using a memory power source and sense amplifiers each amplifying the voltage level developed at one corresponding bit line so as to have a high voltage level or a low voltage level in accordance with the charge stored in each corresponding capacitor. Additionally included are a first circuit which supplies the pre-charge voltage to the pre-charge circuit, the level of the pre-charge voltage is in the middle between the high voltage level and the low voltage level, and a second circuit which supplies a predetermined voltage to the capacitor at its second electrode. Preferably the predetermined voltage supplied from the second circuit is same as the voltage supplied from the first circuit.

REFERENCES:
patent: 4045783 (1977-08-01), Harland
patent: 4195357 (1980-03-01), Kuo et al.
patent: 4291393 (1981-09-01), Wilson

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