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Local test vector generating and optimizing method based on annular oscillator network

A technology of ring oscillators and test vectors, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., to improve the level of automated testing and practical application capabilities, reduce complexity, and improve detection efficiency.

Inactive Publication Date: 2017-05-31
TIANJIN UNIV
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Therefore, the optimized test vector is the key to this method, and there are few mature technology reports

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  • Local test vector generating and optimizing method based on annular oscillator network
  • Local test vector generating and optimizing method based on annular oscillator network
  • Local test vector generating and optimizing method based on annular oscillator network

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[0031] In order to reduce the generation efficiency of optimized test vectors and generate a simplified and efficient test vector set, the present invention proposes a local test vector generation system based on a ring oscillator network, which can generate optimized test vectors in local areas and improve circuit activity in local areas. Used for hardware Trojan testing and rough positioning.

[0032] For the analysis of an n-stage ring oscillator, if the delay of an inverter is t d (t,L,V DD ), it varies with time t, test vector L and power supply V DD The change also changes, then the overall delay of an n-stage ring oscillator is n*t d (t,L,V DD ), when the ring oscillator starts to oscillate, the oscillation period T is shown in Equation 1 below.

[0033] T=2*n*t d (t,L,V DD ) (1)

[0034] If within a fixed period of time K, the count value C of the counter is shown in formula 2 below.

[0035]

[0036] For a fixed test vector, the inverter delay t d (t,L,V ...

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Abstract

The invention relates to a local test vector generating and optimizing method based on an annular oscillator network, belongs to the technical field of trustiness detection of an integrated circuit, and aims at enhancing the circuit activity in the local area, further improving the resistance to hardware Trojans, improving the influencing signal to noise ratio of the hardware Trojans to certain extent under influence of technical noises, and improving the hardware Trojan testing efficiency greatly. According to the method, an original layout is not changed, active sensing units of a local area is inserted into a spare space in the layout, a test circuit is generated, and a local test vector is generated and optimized for the test circuit. The method comprises the following steps that 1) the test circuit is generated; 2) a local test vector generating and optimizing system is initialized; 3) a test vector set is generated randomly, and test vectors are applied; 4) data is collected; 5) determination is completed by test; and 5) the test vectors are optimized. The method is mainly applied to trustiness detection occasions of the integrated circuits.

Description

technical field [0001] The invention relates to the technical field of integrated circuit trustworthiness detection, in particular to a method for generating and optimizing local test vectors based on a ring oscillator network. Background technique [0002] With the rapid development of electronic design automation technology and semiconductor manufacturing technology, the number of transistors integrated in a single integrated circuit chip is increasing, and its functions are becoming more and more powerful. As a result, integrated circuit chips are widely used in various fields of modern technology, especially in In sensitive fields such as financial equipment, mobile communication, transportation, government and energy, integrated circuits play an increasingly important role in promoting social progress and economic development. [0003] In today's globalization of business, in order to shorten the design cycle of integrated circuits and reduce manufacturing costs, the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28
CPCG01R31/2851
Inventor 赵毅强刘燕江何家骥刘阿强
Owner TIANJIN UNIV
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