Invention Grant
- Patent Title: Non-volatile memory circuit using ferroelectric capacitor storage element
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Application No.: US07582672Application Date: 1990-09-14
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Publication No.: US08018754B1Publication Date: 2011-09-13
- Inventor: Joseph T. Evans, Jr. , William D. Miller , Richard H. Womack
- Applicant: Joseph T. Evans, Jr. , William D. Miller , Richard H. Womack
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Dergosits & Noah LLP
- Main IPC: G11C7/00
- IPC: G11C7/00 ; G11C11/22

Abstract:
A non-volatile memory cell and related system utilize ferroelectric capacitors as data storage elements. Circuitry is provided for writing to a single ferroelectric capacitor storage element, as well as to dual storage elements operating inversely. The storage elements are read by use of a sense amplifier in a configuration which automatically restores the original data states, thereby eliminating the need for a subsequent restore operation. Memory systems are described which include circuitry for driving bit lines, word lines and drive lines to accomplish both the write and read operations.
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