Dynamic data restore in thyristor-based memory device

Details Dynamic data restore in thyristor-based memory device Dynamic data restore in thyristor-based memory device

2011-06-14

2011-06-14

Nguyen, Viet Q (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S071000, C365S100000, C365S148000, C365S174000, C365S159000, C257S133000, C257S137000

Reexamination Certificate

active

07961540

ABSTRACT:
A dynamically-operating restoration circuit is used to apply a voltage or current restore pulse signal to thyristor-based memory cells and therein restore data in the cell using the internal positive feedback loop of the thyristor. In one example implementation, the internal positive feedback loop in the thyristor is used to restore the conducting state of a device after the thyristor current drops below the holding current. A pulse and/or periodic waveform are defined and applied to ensure that the thyristor is not released from its conducting state. The time average of the periodic restore current in the thyristor may be lower than the holding current threshold. While not necessarily limited to memory cells that are thyristor-based, various embodiments of the invention have been found to be the particularly useful for high-speed, low-power memory cells in which a thin capacitively-coupled thyristor is used to provide a bi-stable storage element.

REFERENCES:
patent: 4031412 (1977-06-01), Ohhinata et al.
patent: 4604728 (1986-08-01), Okajima
patent: 4829357 (1989-05-01), Kasahara
patent: 4864168 (1989-09-01), Kasahara et al.
patent: 5099300 (1992-03-01), Baliga
patent: 5379174 (1995-01-01), Kasamoto
patent: 5412598 (1995-05-01), Shulman
patent: 6229161 (2001-05-01), Nemati et al.
patent: 6462359 (2002-10-01), Nemati et al.
patent: 6653175 (2003-11-01), Nemati et al.
patent: 6690038 (2004-02-01), Cho et al.
patent: 6690039 (2004-02-01), Nemati et al.
patent: 6727528 (2004-04-01), Robins et al.
patent: 6781907 (2004-08-01), Marr
patent: 6790713 (2004-09-01), Horch
patent: 6845026 (2005-01-01), Gharia
patent: 6885581 (2005-04-01), Nemati et al.
patent: 6944051 (2005-09-01), Lee et al.
patent: 7042759 (2006-05-01), Nemati et al.
patent: 7242607 (2007-07-01), Kim
patent: 7245525 (2007-07-01), Lee et al.
patent: 7405964 (2008-07-01), Philipp et al.
patent: 2002/0089024 (2002-07-01), Iwata
patent: 2003/0218494 (2003-11-01), Kubo et al.

Affiliated with

Also associated with

Rating

Dynamic data restore in thyristor-based memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic data restore in thyristor-based memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic data restore in thyristor-based memory device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2664986