A Compact Inverter‐Based Temperature Compensation for a Subthreshold Analogue Front‐End in Noise‐Shaping SAR ADC

ABSTRACT 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