Triplication redundancy-based anti-radiation self-refreshing register

Abstract

The invention provides a triplication redundancy-based anti-radiation self-refreshing register. In two stages of latch structures of the register, a voter is added to the second-stage latch structure; an output end connected with the register is arranged at the input end of the voter; data of other two input ends are from other two outputs of the self-refreshing register with a triplication redundancy structure. During operation, when one of three data output paths is impacted by single particles to be turned, the rest two paths immediately correct a storage value for the register with a wrong storage value, so that the problem of turnover of two registers caused by radiation accumulation when the registers work in an irradiation environment for a long term is avoided.

Description

technical field [0001] The invention relates to a radiation-resistant self-refresh register based on triple-mode redundancy, which is used to form a triple-mode redundant structure and belongs to the field of integrated circuit design. Background technique [0002] As a spacecraft travels in space, it is constantly exposed to a radiation environment of charged particles. High-energy protons and neutrons in the space radiation environment can cause single event effects in semiconductor devices in electronic systems. Single-Event Effect (SEU) is one of the most serious radiation effects on integrated circuits. Single event flipping will cause various soft errors and seriously affect the reliability of aerospace electronic systems. [0003] In many chips, initial configuration words need to be stored in registers for a long time. Triple Module Redundant (TMR) is an effective method for hardening SEU. The traditional TMR hardening method is to copy a register into three copie...

AI Technical Summary

Problems solved by technology

The traditional TMR hardening method is to copy a register into three copies, and adopt a voting method of choosing two out of three. Any one of the registers is bombarded by heavy particles and flipped, and the circuit works normally when the output of the other two registers is normal; The other two registers in the environment also have the possibility of flipping under the bombardment of heavy particles, resulting in circuit failure

Images