发明授权
- 专利标题: Ferroelectric space charge capacitor memory system
- 专利标题(中): 铁电空间电容电容器存储系统
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申请号: US792888申请日: 1991-11-15
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公开(公告)号: US5245568A公开(公告)日: 1993-09-14
- 发明人: Ciaran J. Brennan
- 申请人: Ciaran J. Brennan
- 申请人地址: MA Cambridge
- 专利权人: Charles Stark Draper Laboratory, Inc.
- 当前专利权人: Charles Stark Draper Laboratory, Inc.
- 当前专利权人地址: MA Cambridge
- 主分类号: G11C11/22
- IPC分类号: G11C11/22
摘要:
A ferroelectric space charge capacitor memory system includes a ferroelectric space charge capacitor memory cell having two ferroelectric space charge capacitor memory devices; a write circuit for applying coercive write voltage to each of the memory devices to establish internal polarization fields and space charge regions of opposite polarity in each device, respectively; a bias voltage circuit for applying to each of the devices a bias voltage less than the coercive voltage at a rate slower than the rate of space charge formation to define a capacitive level representative of one of the polarization states; a read signal circuit for introducing to each of the devices a read signal at a rate faster than the rate of space charge formation, which together with the bias voltage is less than the coercive voltage; and a detector responsive to the read signal for indicating the difference in charge transferred by each memory device representing the logical state of the memory cell.
公开/授权文献
- US4629664A Liquid fuel cell 公开/授权日:1986-12-16