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A memristive system and calibration circuit for eliminating resistance mismatch through electrical signals

A technology for calibrating circuits and resistors, applied in circuits, electrical components, information storage, etc., can solve problems such as inability to reduce resistance, and achieve the effect of saving chip area

Active Publication Date: 2020-06-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Laser trimming technology is suitable for metal film resistors. By using laser to burn off part of the metal film to increase the film resistance, the resistance cannot be reduced.

Method used

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  • A memristive system and calibration circuit for eliminating resistance mismatch through electrical signals
  • A memristive system and calibration circuit for eliminating resistance mismatch through electrical signals
  • A memristive system and calibration circuit for eliminating resistance mismatch through electrical signals

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Embodiment Construction

[0035] The technical solution of the present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0036] Such as figure 2As shown, the memristive system of the present invention is composed of a memristive device M1 and three resistors R1, R2, R3, wherein the memristive device M1 is connected in parallel with the resistor R2 and connected in series with the resistors R1 and R3; the resistor R1 and the memristive device M1 The top electrode is connected, which is defined as node N3, and the other end is connected with the external circuit, which is defined as node N1; the resistor R3 is connected with the bottom electrode of the memristive device M1, which is defined as node N4, and the other end is connected with the external circuit, which is defined as node N2.

[0037] The memristive device is stacked on the CMOS chip, and its structure is as follows figure 1 As shown, from bottom to top are bottom electrode, r...

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Abstract

The invention discloses a memristive system and a calibration circuit for eliminating resistance mismatch through electrical signals. In the memristive system, the memristive device is connected in parallel with a resistor, and then a resistor is connected in series at both ends. The memristive device can be stacked on the integrated circuit chip as an additional layer in the later stage, and the memristive device can be changed according to the input electrical signal through the calibration circuit. system resistance. The present invention utilizes the electrical programmability of the memristive system, only needs electrical signals to adjust the resistance, can correct the resistance value after the chip packaging is completed, and can adjust the resistance multiple times according to the demand during the use of the chip, which solves the problem of integrated circuit The resistance mismatch problem caused by the process error after the chip processing is completed.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a method for eliminating resistance mismatch caused by process errors by using a memristive system after the integrated circuit chip is processed. Background technique [0002] Various technologies are used in the integrated circuit process to prepare resistors, including polysilicon resistors, well resistors, and metal film resistors, but the resistance values ​​of these resistors will deviate from the design value due to process errors. In order to reduce the impact of process errors, techniques such as differential and negative feedback are generally used in circuit design to make the characteristics of the circuit determined by the relative values ​​of the resistors. However, the absolute value of the resistance still has a certain influence on the circuit characteristics. Therefore, in high-precision analog circuits, laser trimming technology is often used to correct the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/24G11C13/00
CPCG11C13/0021H10B63/20
Inventor 杨玉超孙新昊张腾黄如
Owner PEKING UNIV
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