Sense amplifier with hysteresis

Details Sense amplifier with hysteresis Sense amplifier with hysteresis

1995-05-02

1998-02-03

Zarabian, A.

Static information storage and retrieval

Read/write circuit

Differential sensing

365207, G11C 702

Patent

active

057152047

ABSTRACT:
The differential input stage of a sense amplifier is provided with a positive feedback for introducing a predefinable hysteresis that will prevent spurious transitions of the output of the sense amplifier, enhancing noise immunity. The positive feedback is realized by employing an inverting amplifying stage, which will introduce an hysteresis on one of the two switching phases. The thresholds of the sense amplifier may be made symmetric by modifying the area ratio of the load transistors.

REFERENCES:
patent: 5206552 (1993-04-01), Iwashita
patent: 5289415 (1994-02-01), DiMarco
patent: 5446396 (1995-08-01), Brehmer
"CMOS Differential Amplifier with Wide Hysteresis" IBM Tech. Disc. Bulletin, vol. 30, No. 11, Apr. '88, pp. 368-369.
"Design of GaAs Operational Amplifiers for Analog Sampled Data Applications" IEEE Transactions on Circuits and Systems, vol. 37, No. 7, Jul. '90, pp. 922-935.

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