TY  - JOUR
A1  - Breitenreiter, Anselm
A1  - Andjelković, Marko
A1  - Schrape, Oliver
A1  - Krstić, Miloš
T1  - Fast error propagation probability estimates by answer set programming and approximate model counting
JF  - IEEE Access
N2  - We present a method employing Answer Set Programming in combination with Approximate Model Counting for fast and accurate calculation of error propagation probabilities in digital circuits. By an efficient problem encoding, we achieve an input data format similar to a Verilog netlist so that extensive preprocessing is avoided. By a tight interconnection of our application with the underlying solver, we avoid iterating over fault sites and reduce calls to the solver. Several circuits were analyzed with varying numbers of considered cycles and different degrees of approximation. Our experiments show, that the runtime can be reduced by approximation by a factor of 91, whereas the error compared to the exact result is below 1%.
KW  - Circuit faults
KW  - Integrated circuit modeling
KW  - Programming
KW  - Analytical models
KW  - Search problems
KW  - Flip-flops
KW  - Encoding
KW  - Answer set programming
KW  - approximate model counting
KW  - error propagation
KW  - radhard design
KW  - reliability analysis
KW  - selective fault tolerance
KW  - single event upsets
Y1  - 2022
U6  - https://doi.org/10.1109/ACCESS.2022.3174564
SN  - 2169-3536
VL  - 10
SP  - 51814
EP  - 51825
PB  - Inst. of Electr. and Electronics Engineers
CY  - Piscataway
ER  - 
TY  - JOUR
A1  - Andjelković, Marko
A1  - Chen, Junchao
A1  - Simevski, Aleksandar
A1  - Schrape, Oliver
A1  - Krstić, Miloš
A1  - Kraemer, Rolf
T1  - Monitoring of particle count rate and LET variations with pulse stretching inverters
JF  - IEEE transactions on nuclear science : a publication of the IEEE Nuclear and Plasma Sciences Society
N2  - This study investigates the use of pulse stretching (skew-sized) inverters for monitoring the variation of count rate and linear energy transfer (LET) of energetic particles. The basic particle detector is a cascade of two pulse stretching inverters, and the required sensing area is obtained by connecting up to 12 two-inverter cells in parallel and employing the required number of parallel arrays. The incident particles are detected as single-event transients (SETs), whereby the SET count rate denotes the particle count rate, while the SET pulsewidth distribution depicts the LET variations. The advantage of the proposed solution is the possibility to sense the LET variations using fully digital processing logic. SPICE simulations conducted on IHP's 130-nm CMOS technology have shown that the SET pulsewidth varies by approximately 550 ps over the LET range from 1 to 100 MeV center dot cm(2) center dot mg(-1). The proposed detector is intended for triggering the fault-tolerant mechanisms within a self-adaptive multiprocessing system employed in space. It can be implemented as a standalone detector or integrated in the same chip with the target system.
KW  - Particle detector
KW  - pulse stretching inverters
KW  - single-event transient
KW  - (SET) count rate
KW  - SET pulsewidth distribution
Y1  - 2021
U6  - https://doi.org/10.1109/TNS.2021.3076400
SN  - 0018-9499
SN  - 1558-1578
VL  - 68
IS  - 8
SP  - 1772
EP  - 1781
PB  - Institute of Electrical and Electronics Engineers
CY  - New York, NY
ER  -