Latching sense amplifier structure with pre-amplifier

Details Latching sense amplifier structure with pre-amplifier Latching sense amplifier structure with pre-amplifier

1998-07-23

2000-07-11

Mai, Son

Static information storage and retrieval

Read/write circuit

Differential sensing

365205, 327 57, G11C 700

Patent

active

060882786

ABSTRACT:
An apparatus and method for sensing the logical state stored in a memory cell includes a pre-amplifier and a latching sense amplifier. The pre-amplifier receives differential signals from a memory array, shifts the signals and amplifies the differential sufficiently for input to the latching sense amplifier. The gain realized through the pre-amplifier facilitates faster and more reliable sensing of the memory cell state. A method comprises receiving first and second signals representative of a logical state stored in a memory cell, pre-amplifying a difference between the first and second signals to produce third and fourth signals having a greater difference, and amplifying the greater difference to more quickly and reliably produce an output indicative of the logical state stored in the memory cell.

REFERENCES:
patent: 4991141 (1991-02-01), Tran
patent: 5640356 (1997-06-01), Gibbs
patent: 5684750 (1997-11-01), Kondoh et al.
patent: 5696726 (1997-12-01), Tsukikawa
patent: 5706236 (1998-01-01), Yamamoto
patent: 5768202 (1998-06-01), Raad
patent: 5936897 (1999-08-01), Koga

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