Latch fault detection circuit suitable for satellite microprocessor

A microprocessor and detection circuit technology, applied in the direction of electrical digital data processing, error detection/correction, instruments, etc., can solve the problems of electrical overload devices, damage, etc., and achieve the effect of preventing short circuit damage and fast shutdown

Inactive Publication Date: 2007-10-24
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a latch-up condition, the device forms a short circuit between power and ground, causing high current flow, electrical overload, and device damage

Method used

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  • Latch fault detection circuit suitable for satellite microprocessor
  • Latch fault detection circuit suitable for satellite microprocessor
  • Latch fault detection circuit suitable for satellite microprocessor

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] The present invention is a latch failure detection circuit suitable for satellite microprocessors, which is composed of a DSP processor U1, a voltage comparator U2, and a power switch U3; the power switch U3 provides the power required by the satellite microprocessor; the DSP processor U1 outputs the on / off instruction information f for controlling the power switch U3 1 , the on / off command information f 1 It is used to disconnect the power supply of the satellite microprocessor when a "latch" fault occurs to prevent the satellite microprocessor from short-circuiting due to the large current passing through it; when the power switch U3 supplies power to the satellite microprocessor, its output current sampling After the signal passes through the sampling resistor R5, the sampling voltage f is output 2 to the voltage comparator U2; the voltage compara...

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Abstract

The invention discloses a latch accident check circuit for satellite microprocessor, composed of a DSP processor U1, a voltage comparer U2, and a power switch U3, wherein the power switch U3 provides a power supply to the satellite microprocessor, the DSP processor U1 outputs an on/off command f1 to control the power switch U3, while the f1 is used to cut off power supply when the satellite microprocessor has latch accident to avoid short circuit of the satellite microprocessor caused by large current, and when the power switch U3 powers the satellite microprocessor, the output current sample signal via a sample resistance R5 outputs a sample voltage f2 to the voltage comparer U2 which processes differential comparison on the received sample voltage f2 and a reference voltage f0, to output a digit logic signal f3 to the DSP processor U1.

Description

technical field [0001] The invention relates to an anti-latch fault detection circuit suitable for satellite microprocessors. Background technique [0002] With the increasing role of satellites in the national economy, the complexity of their functions is also increasing; the amount of calculation, time requirements and volume limitations required to achieve certain functions are beyond the reach of general electronic components. Yes, in this case the high-performance microprocessor becomes the preferred central processing unit of the satellite. High-performance microprocessors are highly integrated, and the safety and reliability of their work are crucial to satellites. If a failure occurs, the consequences are often catastrophic. [0003] There are some charged particles in space. When they pass through electronic devices, they will cause ionization inside the electronic device. When the ionization effect accumulates to a certain extent, a strong electric field will be f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/00
Inventor 金靖张忠钢李敏田海亭徐小斌吕峰建
Owner BEIHANG UNIV
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