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:
Nov. 26, 1996
Filed:
Aug. 31, 1995
Jy-Der D Tai, Phoenix, AZ (US);
Motorola, Inc., Schaumburg, US;
Abstract
A method for reading and restoring data in a FERAM (10) is provided. The FERAM (10) comprises a FET (11) and a ferroelectric capacitor (12). The FET (11) has a gate connected to a word line (14), a source coupled to a plate line (15) via the ferroelectric capacitor (12), and a drain connected to a bit line (16). The reading process begins by placing a predetermined amount of charge in a bit line capacitor (17), which in turn charges the ferroelectric capacitor (12) after the FET (11) is switched on, resulting in a voltage drop determined by data stored in the FERAM (10) at the bit line (16). A sense amplifier (18) adjusts the voltage at the bit line (16) accordingly to read data from the FERAM (10). Applying a voltage at the plate line (15) and switching the FET (11) off restore the data to the FERAM (10).