Deep-Tech Blog10 August 2026
Radiation Hardening Techniques for Mixed-Signal Space Payloads
Architecting mixed-signal ASICs to withstand Total Ionizing Dose (TID) radiation and Single Event Latch-up (SEL) in LEO and GEO orbital trajectories through triple-modular redundancy and guard rings.
By SPACE HARDENING DESK
By Space Systems Desk
Commercial off-the-shelf (COTS) ICs fail rapidly when exposed to space radiation. In low Earth orbit (LEO) and geostationary orbits (GEO), silicon devices encounter Total Ionizing Dose (TID) and heavy-ion Single Event Effects (SEE).
To ensure 10+ year mission lifetimes, Qailash Labs deploys radiation-hardening-by-design (RHBD) methodologies:
- Guard-Rings & Substrate Taps: Continuous guard rings around sensitive analog nodes to prevent parasitic thyristor latch-up (SEL).
- Enclosed Layout Transistors (ELTs): Eliminating oxide leakage paths along edge channels under ionizing radiation.
- Triple Modular Redundancy (TMR): Voting logic deployed across all internal digital state machines and configuration registers.