A_Single_Event_Transient__SET__Tolerant_Dynamic_Bias_Comparator_in_65_nm_CMOS.pdf (1.78 MB)
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A Single-Event Transient (SET) Tolerant Dynamic Bias Comparator in 65-nm CMOS

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posted on 2023-08-16, 14:36 authored by Andrew AshAndrew Ash, John HuJohn Hu

A single-event transient (SET) tolerant dynamic bias comparator leveraging path-splitting is presented in this paper. The dynamic bias structure with a tail capacitor is found to be vulnerable to positive and negative SET transients. A negative transient on the tail transistor doubles the energy per conversion. A positive transient on the tail MOS capacitor reduces the preamplifier gain by 35.7%, which increases the metastability error rate in the subsequent latch. A path splitting technique is applied to mitigate the positive SET. Simulations in a 65-nm CMOS process showed that a two path split can recover the comparator output voltage swing by 12.7%. Compared with the state-of-the-art CMOS radiation-hardened by design (RHBD) dynamic comparators, this circuit achieved the lowest energy per comparison while maintaining low input referred noise and gaining SET tolerance in the evaluation phase. 


NASA Oklahoma EPSCoR Research Infrastructure Development Grant 80NSSC002M0029


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Oklahoma State University

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  • United States of America