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本论文提出一款2.19µW自供电SoC，集成多模态能量收集与双通道-92dBm灵敏度无线接收功能，采用近阈值电压和自适应电压频率缩放（AVFS）技术提升能效与可靠性，并内置4nW、±4.8°C精度的片上温度传感器。
Everactive, Charlottesville, VA, 2Everactive, Santa Clara, CA, 3Everactive, Ann Arbor, MI preserved. The SoC is designed to operate near-threshold to achieve its low power floor. Thus, an AVFS block is included to improve energy efficiency and reliability and reduce margin across wide process variation and an industrial temperature range of -40°C to 85°C at near-threshold voltages. To determine the temperature, a 4nW, ±4.8°C on-chip sensor is implemented using a 2-transistor design and connected to one of the inputs of the analog-to-digital converter (ADC). The AVFS accelerator periodically reads the temperature and process information, determines the optimal VADJ-frequency pair, and passes VADJ to the EH-PMU and frequency to the clocking sub-system. The EAS also controls an integrated load switch circuit (Fig. 15.1.1) that powers the off-chip components to ensure the power floor is achieved regardless of the platform-level
Energy Harvesting, Dual-Channel up to -92dBm WRX and, Energy-Aware Subsystem