Analog Design of Electronic Systems for Harsh Environments

Advancements in electronics are expanding possibilities in environments with extreme conditions, such as high-temperature industrial settings and biomedical implants. These applications demand robust, efficient systems to ensure reliability, safety, and longevity. In harsh environments, electronics support critical functions like monitoring, control, and predictive maintenance in aerospace, energy, and industrial systems. In biomedicine, implantable devices enable long-term monitoring and targeted treatments, requiring low power and high safety. This thesis contributes to both domains. The first part focuses on analog circuit design for high-temperature operation, using SOI CMOS technology. Though commercial SOI processes are only qualified up to 175 °C, this work characterizes device parameters through measurement and demonstrates a custom Delta-Sigma ADC functioning up to 250 °C by applying targeted design techniques. The second part addresses wireless power transfer for implantable devices. A system with load modulation feedback is developed to minimize tissue absorption while maintaining stable operation. A key application is robotic capsule endoscopy, combining wireless power with magnetic navigation. Integration challenges are addressed and validated, showing the feasibility of a fully autonomous capsule system for advanced gastrointestinal diagnostics and therapy.