Authors: M. Grecki
Affilation: Technical University of Lodz, Poland
Pages: 717 - 720
Keywords: SEU, VHDL, simulation
The SEEs can be destructive for semiconductor devices, however non-destructive SEE called SEU ( Single Event Upsets) resulting of bit flips seems to be the main problem. Due to reduction of feature size the SEUs play an increasing role in failures observed during operation of digital circuits, particularly in environments with remarkable radiation level (avionics, nuclear industry, High Energy Physics instrumentation etc.). The special design methods, based on hardware and software redundancy, allow to detect and correct radiation influenced SEUs during system operation, making such a system radiation-tolerate.<br>This paper presents the SEUSIM software library and method of VHDL model conversion that allow to simulate the operation of digital circuit taking into account SEUs. The library is written in pure VHDL so it can be used by most VHDL simulators. <br>The simulation example concerns the control system applied in RadMon neutron detector. The simulation results well correspond to the data calculated from mathematical model of SEU occurrence. The simulation considering SEUs can be used in design of radiation tolerate circuits.