Radiation effects in a fixed-point digital signal processor

Crain, S.; Velazco, Raoul; Álvarez, M.; Bofill, A.; Yu, Pengpeng; Koga, R.

doi:10.1109/redw.1999.816053

Cited by 4 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High performance, radiation hard Digital signal processor (DSP) was developed for space applications in 1990s [ 1 ] . The bias current is monitored to charactering the Total ionizing dose (TID) effect until function fail [ 2 , 3 ] . Considering the advantages of cost, weight and acquisition cycle, the tendency of employing Commercial off‐the‐shelf (COTS) has been driven by DoD since 1994 [ 4 ] .…”

Section: Introductionmentioning

confidence: 99%

Total Ionizing Dose Effect and Failure Mechanism of Digital Signal Processor

Xin

et al. 2021

Chinese J of Electronics

View full text Add to dashboard Cite

Ionizing radiation effect and failure mechanism of Digital signal processor (DSP) is studied through test‐board and automatic test equipment to find the relationship between system function failure and parameter degradation. Static bias is more sensitive than dynamic bias when DSP is tested on‐line during radiation. Core current, high‐Z leakage current and timing parameter are sensitive to ionizing radiation. No enhanced low‐dose‐rate sensitivity is found by comparing experiment results under high and low dose rate radiation. External memory interface and Timer are deduced to be the sensitive module by step radiation and analysis basing full parameter test in Verigy 93000. The timing parameter degradation have a strong correlation to these module functions. And the degeneration mechanism is analysed on inverter through Hspice simulation which indicate the leakage circuit caused by radiation can lead a delay to the digital signal propagating. The parasitical capacitance among long connections make it worse to the data transmission around DSP, field programmable gate array and memory. Then an early function failure occurs in test board than Verigy 93000. This work provide support to systematic radiation hardness design and hardness assurance/lot acceptance testing in space applications.

show abstract