Sense amplifier and semiconductor memory device having sense...

Details Sense amplifier and semiconductor memory device having sense... Sense amplifier and semiconductor memory device having sense...

2011-05-17

2011-05-17

Le, Thong Q (Department: 2827)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S196000, C365S189070, C365S189050, C365S191000

Reexamination Certificate

active

07944766

ABSTRACT:
A sense amplifier comprises: a differential amplifier circuit configured to generate an amplified signal depending on a difference in voltage between bit lines; an output circuit receiving the amplified signal; and a load. The differential amplifier circuit comprises: a first output node supplying the amplified signal to the output circuit; and a second output node symmetrically placed with respect to the first output node and connected to the load. The output circuit comprises an output terminal for outputting an output signal generated based on the amplified signal. In response to a control signal, the load switches between a first capacitance value with which an offset voltage at the output terminal becomes a first voltage and a second capacitance value with which the offset voltage becomes a second voltage.

REFERENCES:
patent: 2006/0262621 (2006-11-01), Forbes
patent: 2002-083497 (2002-03-01), None
patent: 2003-173685 (2003-06-01), None

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