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Journal Article
A Compact Inverter-Based Temperature Compensation for a Subthreshold Analog Front-End in Noise-Shaping SAR ADC
- Authors
- Jeonghun Lee, Tae-Hyun Kim, Jeetaeck Seo, Sukho Lee, Kwang-Hyun Baek
- Issue Date
- 2026-03
- Citation
- Electronics Letters, v.62, no.1, pp.1-5
- ISSN
- 0013-5194
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- 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 (Formula presented.) CMOS process, where the core compensation blocks occupy a compact area of only (Formula presented.). 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 (Formula presented.) range, with the proposed technique improving the average SNDR by (Formula presented.) at low temperatures and achieving a power reduction of (Formula presented.) at high temperatures. Notably, the compensation unit consumes less than (Formula presented.) of the total system power.
- Keyword
- analogue-digital conversion, circuit optimisation, compensation, integrated circuit design, low noise amplifiers, mixed analogue-digital integrated circuits
- KSP Keywords
- Adaptive performance, Analog Front-end, CMOS Process, Digital integrated circuits, Formula presented, High temperatures, Integrated Circuit Design, Low-Noise Amplifier(LNA), Operating zone, Performance compensation, Power applications
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
