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Experimental method for single event effects (SEE) of pulse width modulator (PWM)

A technology of single event effect and pulse width modulator, which is applied in the direction of instruments, electronic circuit testing, measuring devices, etc., and can solve problems such as PWM electrical performance changes, faults, and abnormalities in spacecraft electronic systems

Inactive Publication Date: 2010-09-29
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the electronic system of the spacecraft is abnormal and fails due to the change of the PWM electrical performance caused by the single event effect, and proposes an experimental method for the single event effect of the pulse width modulator

Method used

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  • Experimental method for single event effects (SEE) of pulse width modulator (PWM)
  • Experimental method for single event effects (SEE) of pulse width modulator (PWM)
  • Experimental method for single event effects (SEE) of pulse width modulator (PWM)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Californium source simulates PWM UC1845 single event effect test, and its experimental system is as follows: figure 2 shown.

[0022] 1) Uncover the UC1845 device in the ceramic package, place the normal UC1845 device in the vacuum chamber after opening the cover, and correctly connect the test system and power supply system;

[0023] 2) On the basis that the sample works normally, the fission fragments of californium source are used for irradiation;

[0024] 3) During the irradiation process, the monitoring system monitors in real time whether the SEE phenomenon occurs in the tested sample, the beam current monitoring system monitors the fluence rate of the incident particles in real time, the test system can observe the obvious single event effect phenomenon, and record the single event event Number, electrical parameters of the sample and irradiation time to calculate the single particle cross section. The test results are shown in Table 1.

[0025] Table 1 Singl...

Embodiment 2

[0028] Pulse laser simulates PWM UC1845 single event effect test, and its experimental system is as follows: image 3 shown.

[0029] 1) Uncover the UC1845 device in the ceramic package, place the normal UC1845 device on the DUT mobile platform of the laser simulation single event effect test system, and correctly connect the test system and power supply system;

[0030] 2) Focus on the DUT platform sample of the laser simulation single event effect test system;

[0031] 3) After focusing, start pulsed laser irradiation on the basis that the sample is working normally;

[0032] 4) During the irradiation process, determine the single event sensitive area of ​​the UC1845 device and the energy threshold of the single event effect of the device. The test results are shown in Table 2.

[0033] Table 2 SEE energy threshold of UC1845 device

[0034]

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PUM

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Abstract

The invention discloses an experimental method for single event effects (SEE) of a pulse width modulator (PWM) and belongs to the technical field of space radiation effects and hardening. The method comprises the following steps of: numbering test samples; inserting the numbered test samples into a board, wherein a tested circuit board moves in accordance with a movable bracket; performing a power-on test on a test system; starting a radiation source; in a radiating process, monitoring the single event effects of the tested samples in real time by using a monitoring system; monitoring the fluence rate of incident particles in real time by using a beam monitoring system; and recording the number of the single event effects, the electrical parameters of the samples and the radiation time. The method can realize an evaluation test on the anti-SEE performance of a PWM device and obtain a single particle LET threshold or an energy threshold or a sigma-LET or E curve of the PWM device.

Description

technical field [0001] The invention relates to a pulse width modulator single-event effect experimental method, which belongs to the technical field of space radiation effect and reinforcement. Background technique [0002] Spacecraft flying in outer space are always in a radiation environment composed of charged particles. High-energy particles in the space radiation environment can cause single event effects (SEE) in semiconductor devices and integrated circuits in spacecraft, which has become the main factor affecting the high reliability and long life of spacecraft in orbit, and has attracted the attention of spacecraft designers. [0003] Pulse Width Modulator (PWM) has the advantages of low cost, small size, and strong anti-noise performance, and is widely used in many fields such as aerospace measurement, communication, and power control and conversion. Due to the high-energy particles in the space radiation environment are easy to induce the single event effect (SE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/302
CPCG01R31/2881G01R31/303G01R31/31816
Inventor 薛玉雄田恺马亚莉杨生胜曹洲
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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