Dual redundant decoding drive circuit for satellites to prevent single point failure, and medium

Abstract

The invention relates to a dual redundant decoding drive circuit for satellites to prevent single point failure, and a medium. The circuit includes a dual redundant decoding circuit and a dual redundant output drive circuit. The dual redundant decoding circuit consists of two decoding circuits which have the same structures and are independent with each other; the decoding circuits share a set ofinput signals, separately perform decoding to output two sets of independent decoding signals so that the dual redundant decoding function can be accomplished, and the decoding signals can be used ascontrol signals of a post stage dual redundant output drive circuit; the dual redundant output drive circuit adopts four PMOS output driving tube structures that two of the structures are in parallelconnection and the other two are in series connection; the dual redundant output drive circuit can be controlled by the two sets of independent front stage decoding signals; the output can be the highlevel only when the output PMOS tubes in series are conducted; and the circuit can output normally when a single PMOS tube is in open-circuit or short-circuit state. The dual redundant decoding and dual redundant decoding output drive structure can effectively avoid single point failure, enhance the reliability of the circuits and ensure the correction of output instructions.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and relates to a command decoding drive circuit for satellites, in particular to a double-redundant decoding drive circuit and medium for preventing single-point failures for satellites. The application of dual redundant backup with point failure. Background technique [0002] The command decoding drive circuit is the core component of the satellite remote control subsystem. Most of the command actions it outputs are key actions related to the success or failure of the satellite, such as the deployment of solar panels and the detonation of pyrotechnics. Therefore, the reliability requirements for it are very high. [0003] Affected by space particles during the satellite’s in-orbit operation, various single-event effects often occur in the command decoding drive circuit built with discrete combinational logic devices, including single-event transient pulse (SET), single-event latch-up (SEL), si...

AI Technical Summary

Problems solved by technology

[0003] Affected by space particles during the satellite’s in-orbit operation, various single-event effects often occur in the command decoding drive circuit built with discrete combinational logic devices, including single-event transient pulse (SET), single-event latch-up (SEL), single-event Particle grid penetration (SEGR), etc., are likely to cause single point failures and lead to command output failures, which are difficult to meet the high reliability requirements of satellite systems

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