Dynamic reference system for sense amplifier

Details Dynamic reference system for sense amplifier Dynamic reference system for sense amplifier

1993-10-12

1994-10-11

LaRoche, Eugene R.

Static information storage and retrieval

Read/write circuit

365207, 365210, 307360, 307530, G11C 700

Patent

active

053553330

ABSTRACT:
A dynamic reference system for a sense-amplifier is implemented by using an asymmetric pair of transistors (one twice the size of the other) in the current paths between two selected sensing lines and a source of a bias current in order to superimpose an offset current to the currents forced through the loads of the two sensing lines. The asymmetric transistors may be driven by the signals which are generated by a pair of cascode circuits which are normally used to drive the load-connecting switches of the sensing network or by the signals present on the "other one" of the two sensing lines. This introduces a dynamic behavior of the reference system during an evaluation phase of a reading cycle which follows a first capacitance-charging phase, thus enhancing overall discrimination performances of the sense amplifier. The reference system is simple to implement and offers a number of advantages as compared to "static" reference systems of the prior art.

REFERENCES:
patent: 4543500 (1985-09-01), McAlexander, III et al.
patent: 4843264 (1989-06-01), Galbraith
patent: 5117394 (1992-05-01), Amin et al.
patent: 5218570 (1993-06-01), Pascucci et al.
Patent Abstracts of Japan, vol. 6, No. 212 (P-151)(1090) Oct. 26, 1982 & JP-A-57 117 180 (Toshiba) *abstract*.

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