Circuit and method of driving bitlines of integrated circuit...

Details Circuit and method of driving bitlines of integrated circuit... Circuit and method of driving bitlines of integrated circuit...

2007-04-24

2007-04-24

Ho, Hoai V. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Flip-flop used for sensing

C365S149000, C365S203000, C365S210130

Reexamination Certificate

active

11180832

ABSTRACT:
Provided are a bitline driving circuit of an integrated circuit memory that enhances a precharge scheme and a sense amplification scheme and a bitline driving method. In the bitline driving circuit, a new scheme of precharging the bitlines to voltages greater than or smaller than a voltage VCCA/2 using an auxiliary circuit is used to increase a gate-source voltage of transistors included in each sense amplification circuit. Also, when cell data is 1 and 0, a dummy cell can maintain a voltage difference between the bitlines BL and BLB generated after charge sharing. Furthermore, a sense amplification circuit, which is controlled by an offset control circuit, can remove a threshold voltage offset between the transistors included in each sense amplification circuit. At this time, an auxiliary circuit is used to stabilize the voltage difference.

REFERENCES:
patent: 6052324 (2000-04-01), Tobita
patent: 6594187 (2003-07-01), Ito
patent: 6797997 (2004-09-01), Hata
patent: 2002-157885 (2002-05-01), None
patent: 100167673 (1998-09-01), None
patent: 1020030056465 (2003-07-01), None
patent: 1020040003210 (2004-01-01), None

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