Sense amplifier design

Details Sense amplifier design Sense amplifier design

1996-11-12

1998-04-07

Nguyen, Tran T.

Static information storage and retrieval

Read/write circuit

Flip-flop used for sensing

365206, 36518906, 36518411, 327351, G11C 700

Patent

active

057372748

ABSTRACT:
The present invention concerns a method and apparatus that generally prevents a glitch from occurring in an output of a sense amplifier during a transition from a strong zero to a weak zero. The present invention detects the voltage difference between a virtual ground node and a read product term line and turns off a pull down of a first stage of the sense amplifier. The low on the read product term line generally causes a node between the first and second stage of the sense amplifier to swing high for both a strong or weak zero condition. A diode clamp generally limits the current drawn under the strong or weak zero condition by clamping the output of the first stage from going too high. When a transition from a strong zero to a weak zero occurs, the output of the first stage essentially remains high since the gate to source drive on the pulldown remains considerably weak.

REFERENCES:
patent: 4871933 (1989-10-01), Galbraith
patent: 5023841 (1991-06-01), Akrout et al.
patent: 5093806 (1992-03-01), Tran
patent: 5585747 (1996-12-01), Proebsting

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