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Circuit for prolonging service life of ferroelectric non-volatile trigger

A trigger, non-volatile technology, used in instruments, static memory, digital memory information, etc.

Active Publication Date: 2012-07-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]However, since the erasable times of the ferroelectric film are limited, its read and write times are about 1013. For a circuit with frequent erasing and writing, this The number of times is far from enough, so a new method needs to be developed to increase the service life of ferroelectric thin films

Method used

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  • Circuit for prolonging service life of ferroelectric non-volatile trigger
  • Circuit for prolonging service life of ferroelectric non-volatile trigger
  • Circuit for prolonging service life of ferroelectric non-volatile trigger

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Embodiment Construction

[0020] When RW is held low, the flip-flop works the same as a normal flip-flop. When writing to the backup module, RW inputs a high level, and Pch remains "0". When the clock Clk is turned on as "1", the input signal Din is latched into Q. At the same time, during this period, a positive pulse is generated on the PL, and a pair of complementary values ​​a and b are stored in a pair of ferroelectric capacitors, thus ensuring the preservation of the state when the latch works normally.

[0021] Data restoration can be completed by performing a read operation on the backup module immediately after a power failure. Among them, RW inputs a high level, Din and Clk remain "0", a positive pulse on Pch is used to pre-discharge nodes a and b, and then a positive pulse is generated on PL to drive a pair of ferroelectric capacitors. Due to the different polarization states of the two ferroelectric capacitors, a voltage difference will be formed between nodes a and b, and this voltage dif...

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Abstract

The invention relates to a circuit for prolonging the service life of a ferroelectric non-volatile trigger, belonging to the field of circuit design. The circuit is characterized by providing a novel circuit structure of the non-volatile trigger, wherein a state comparison module is added into the circuit structure for comparing a current state of a ferroelectric capacitor with a state of the ferroelectric capacitor, which needs to be written in, and then judges and controls whether write operation is carried out or not. The invention effectively prevents the unnecessary write operation of the ferroelectric capacitor, thereby prolonging the service life of the ferroelectric capacitor.

Description

technical field [0001] The invention relates to a technology for increasing the service life of a ferroelectric non-volatile trigger, which belongs to the field of circuit design. Background technique [0002] In recent years, an integrated system on a chip (SoC: System on Chip) is one of the most important development directions of microelectronics technology. Non-volatile storage technology is an important part of the future development of micro-nano technology, and it is also an important basis for future SoC applications. There are some problems in traditional memory, such as loss of information when power off, slow read and write speed, insufficient erasable times, etc. Therefore, one of the ways to solve these problems is to use high-speed and large-capacity non-volatile memory to replace on-chip RAM to increase the reliability of the circuit and effectively reduce power consumption. [0003] Ferroelectric technology is one of the non-volatile technologies currently ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C11/22
Inventor 刘勇攀杨华中王珏
Owner TSINGHUA UNIV