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A non-volatile flip-flop circuit based on phase-change memory cell

A phase-change storage and non-volatile technology, applied in the field of non-volatile flip-flop circuits, can solve the problem that the memory cannot save data, etc.

Active Publication Date: 2018-12-18
SHANGHAI XINCHU INTEGRATED CIRCUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defect in the prior art that the memory cannot save data after power-off, the present invention designs a non-volatile flip-flop circuit based on a phase-change memory unit, which enables the data of the flip-flop to be saved after power-off

Method used

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  • A non-volatile flip-flop circuit based on phase-change memory cell
  • A non-volatile flip-flop circuit based on phase-change memory cell
  • A non-volatile flip-flop circuit based on phase-change memory cell

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Embodiment 1

[0069] This embodiment proposes a specific realization circuit of a non-volatile flip-flop based on a phase-change memory, and the flip-flop can be any type of flip-flop such as a D flip-flop, a JK flip-flop, a T flip-flop or an RS flip-flop. This embodiment is described by taking a D flip-flop as an example. figure 1 For the D flip-flop circuit diagram in the non-volatile flip-flop circuit based on the phase-change memory unit in this embodiment, a simple synchronous D flip-flop circuit such as figure 1 As shown, its state equation is:

[0070] Q n+1 =D(CLK=1);

[0071] Q is the output signal, D is the output signal, n can be a positive integer, that is, when CLK is low, the output terminals of the NAND gate G1 and the NAND gate G2 are forced to be set to 1, and the NAND gates G3 and G4 are equivalent to two Inverter, the two are cascaded to form a latch to latch data, and the output terminal holds the data; when the rising edge of CLK comes, the data at the D terminal pas...

Embodiment 2

[0079] Figure 10 This embodiment is based on the nonvolatile flip-flop circuit diagram of the phase-change memory cell in the second embodiment of the non-volatile flip-flop; this embodiment is another non-volatile flip-flop based on the phase-change memory cell. Realize the circuit as Figure 10 shown. Among them, inverters I1 and I2 and NOR gates O1 and O2 are added in the NAND gates G3 and G4, and their functions are the same as figure 1 The role of PMOS1 and PMOS2 is the same. and figure 1 The difference in the implementation of the circuit is that the current direction of the non-volatile flip-flop is different in storing and restoring data. When storing data, the current of the writing signal SET terminal or RESET terminal flows from the word selection transistor N3 or N4 through the phase change resistors R1 and R2 to the internal latch of the flip-flop; The variable resistors R1 and R2 flow into the ground through the word selection transistor. Its storage princ...

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Abstract

The invention relates to a trigger, and especially relates to a nonvolatile trigger circuit based on a phase change memory unit. According to the nonvolatile trigger circuit based on the phase change memory unit, the output end of a trigger in the trigger circuit is connected with a nonvolatile storage circuit; the nonvolatile storage circuit stores work state data when power of the trigger fails; and the when the trigger is reenergized, the nonvolatile storage circuit, according to the work state data, restores the trigger to a work state during power failure of last time.

Description

technical field [0001] The invention relates to a flip-flop, in particular to a non-volatile flip-flop circuit based on a phase-change memory unit. Background technique [0002] With the development of embedded memory technology, compared with traditional processors, non-volatile processors composed of non-volatile registers have the following advantages: (1) Zero standby power consumption: in The nonvolatile processor maintains the state of internal registers during a power loss without consuming power. Traditional processors have to consume more and more leakage power in order to maintain data integrity; (2) Immediate startup and shutdown: non-volatile processors can resume work from a stalled state within a few clock cycles, while traditional processing The processor needs millions of clock cycles; (3) Strong recovery ability after power failure: After a sudden power interruption, the non-volatile processor can still guarantee data integrity, while the traditional proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/356G11C13/00
CPCG11C13/0004H03K3/356
Inventor 叶勇亢勇陈邦明
Owner SHANGHAI XINCHU INTEGRATED CIRCUIT