The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1996
Filed:
Aug. 26, 1994
John J Drab, Encitas, CA (US);
O Glenn Ramer, Los Angeles, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A memory includes a first ferroelectric capacitor and a second ferroelectric capacitor electrically connected in a parallel arrangement, and writing circuitry that writes controllably different polarization states into the two ferroelectric capacitors using a single input signal. Read circuitry senses the difference in stored polarizations in the first ferroelectric capacitor and the second ferroelectric capacitor. This sensing circuit causes only a partial switching of the polarization state of the first ferroelectric capacitor and does not disturb the polarization state of the second ferroelectric capacitor. There is a restoration circuit to restore the original ferroelectric polarization of the ferroelectric capacitors following reading.