Projects per year
Abstract
This paper proposes a memristor-assisted sign-based background calibration scheme for analog-to-digital converters (ADCs). The scheme was implemented and validated in a 12-bit asynchronous successive approximation register (SAR) ADC, which consists of a hybrid binary weighted/R-2R digital-to-analog converter (binary/R-2R DAC) and other peripheral circuits. This hybrid DAC, in which one redundancy bit is introduced, is built with a memristor and standard polysilicon resistors. The proposed calibration technique can detect the errors caused by DAC mismatches and correct them by adjusting the resistance of the memristor (memristance) in a feedback loop. The implemented circuit takes the memristor's advantages such as small area and resistance switching property. The proposed scheme has been designed and simulated in a standard 180 nm CMOS process. Eventually, a monolithic CMOS/memristor chip will be fabricated with the CMOS part processed at a standard foundry and the memristors integrated through post-CMOS processing in house. Simulation results demonstrate the feasibility of exploiting memristors to improve the linearity of high-resolution SAR ADCs. The designed calibration scheme can effectively reduce the integral non-linearity (INL) and differential non-linearity (DNL) of the 12-bit SAR ADC.
Original language | Undefined/Unknown |
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Pages (from-to) | 3497-3508 |
Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
Volume | 70 |
Issue number | 9 |
Early online date | 17 May 2023 |
DOIs | |
Publication status | Published - 1 Sept 2023 |
Keywords / Materials (for Non-textual outputs)
- Calibration
- Codes
- Memristor
- Memristors
- Programming
- Redundancy
- Registers
- Resistance
- SAR ADC
- hybrid DAC
- memristor-assisted calibration
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AI MeTLLE: Memristive Technologies for Lifelong Learning Embedded AI Hardware (AI MeTLLE)
Prodromakis, T. (Principal Investigator)
1/05/22 → 31/12/29
Project: Research
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FORTE: Functional Oxide Reconfigurable Technologies (FORTE): A Programme Grant
Koch, D. (Principal Investigator), Prodromakis, T. (Principal Investigator), Constandinou, T. G. (Co-investigator), Dudek, P. (Co-investigator) & Papavassiliou, C. (Co-investigator)
Engineering and Physical Sciences Research Council
1/05/22 → 30/03/25
Project: Research