A PVT-Invariant Front-End Ring Amplifier using Self-Stabilization Technique for SAR ADC
Journal
Proceedings - IEEE International Symposium on Circuits and Systems
Journal Volume
2022-May
ISBN
9781665484855
Date Issued
2022-01-01
Author(s)
Abstract
This paper proposes a ring amplifier with a self-stabilization technique (SST) against PVT variation. It can significantly alleviate the risk of the instability issue, which is particularly problematic in the front-end design. This technique automatically adjusts the dead-zone voltage ({V}-{DZ}) according to the output voltage ringing magnitude directly. With the technique, the ring amplifier can find a suitable dead-zone voltage with minimal accuracy degradation even in a wide PVT range without adding a complex control circuit or algorithm. This technique is applied on a ring amplifier with 10-bit SAR (Successive-Approximation) ADC, and both are implemented in the 40-nm CMOS process. According to the measurement results, 51.43 dB SNDR, 60.24 dB SFDR, and 8.25-bit at 500ksps are achieved while consuming 36 muW.
Subjects
PVT variation | ring amplifier | SAR ADC | self-stabilization technique | sensor applications
Type
conference paper