Differential amplifier and bit-line sense amplifier adopting...

Details Differential amplifier and bit-line sense amplifier adopting... Differential amplifier and bit-line sense amplifier adopting...

2006-10-17

2006-10-17

Zarabian, Amir (Department: 2827)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S189050, C365S205000, C365S207000, C327S051000, C327S057000

Reexamination Certificate

active

07123531

ABSTRACT:
A bit-line sense amplifier is disclosed that includes switching elements to sequentially modify the sense amplifier to a negative feedback differential amplifier, a normal differential amplifier, a positive feedback differential amplifier, and a cross-coupled latch, in that order. The sense amplifier sensing data on a pair of bit-lines in a semiconductor memory; and a transistor is connected between one of the differential amplifiers and a common current source. The transistor has a resistance which is variable depending on a potential of an output of one of the differential amplifiers or remains constant by a different power source.

REFERENCES:
patent: 5434821 (1995-07-01), Watanabe et al.
patent: 6037807 (2000-03-01), Wu et al.
patent: 6466501 (2002-10-01), Kim et al.
patent: 6914836 (2005-07-01), Jeon et al.

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