ScholarWorks@중앙대학교

초록

This letter presents an adaptive temperature compensation technique for a subthreshold analogue front-end (AFE) in low-power application. The conventional subthreshold AFE suffers from significant temperature dependency, compromising performance over a wide operating range. To overcome this critical issue, the proposed technique provides adaptive performance compensation, driven by a compact inverter-based sensor that identifies the current operating zone. This work was fabricated in a CMOS process, where the core compensation blocks occupy a compact area of only . To demonstrate its advantages, the proposed circuit was integrated with an AFE-embedded noise-shaping SAR ADC. Measurement results confirm robust performance for the entire system across a -40 to range, with the proposed technique improving the average SNDR by at low temperatures and achieving a power reduction of at high temperatures. Notably, the compensation unit consumes less than of the total system power.

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