A Single-Event Transient Radiation Hardened Low-Dropout Regulator for LC Voltage-Controlled Oscillator

A voltage-controlled oscillator (VCO) is an essential part of the clock circuitry in satellite communication systems. Low-dropout regulators (LDO) provide stable voltage supply to the VCO and inevitably bring in new radiation-sensitive nodes. In this paper, by conducting single-event transient (SET)...

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Bibliographic Details
Published in:Symmetry (Basel) 2022-04, Vol.14 (4), p.788
Main Authors: Chen, Xi, Guo, Qiancheng, Yuan, Hengzhou, Guo, Yang
Format: Article
Language:English
Subjects:
Circuits
Communications systems
Decoupling
Digital music
low-dropout regulator (LDO)
Nodes
Noise
Power supply
Radiation
Radiation hardening
radiation-hardened-by-design (RHBD)
Satellite communications
Semiconductor devices
Sensitivity analysis
single-event transient (SET)
Transistors
Voltage controlled oscillators
voltage regulator
voltage-controlled oscillator (VCO)
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Summary:A voltage-controlled oscillator (VCO) is an essential part of the clock circuitry in satellite communication systems. Low-dropout regulators (LDO) provide stable voltage supply to the VCO and inevitably bring in new radiation-sensitive nodes. In this paper, by conducting single-event transient (SET) sensitivity analysis of LDO in voltage-regulated VCO, we find the sensitive nodes of LDO in oscillation circuits located on the relevant transistors that determine the bias voltage of the tail transistor in the error amplifier (EA). To immunize SET, a symmetrical hardening method combining sensitive node splitting and resistive-decoupling is proposed for the sensitive nodes. This method achieves 80.8% analog single-event transient (ASET) mitigation. This study was conducted in 28-nm CMOS process.
ISSN:2073-8994
2073-8994
DOI:10.3390/sym14040788