A self-calibration method for fast, high resolution A/D and D/A converters

Manoli, Yiannos

doi:10.1109/iscas.1989.100343

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…E.g., in [11], DAC unit elements have been measured by a slope converter and thereafter been calibrated. In [12], a SAR ADC has been implemented mismatch self-calibration with 6 × 6 bit digital correction data stored in the digital domain.…”

Section: Exploiting Weak Pufs In Data Convertersmentioning

confidence: 99%

Exploiting Weak PUFs From Data Converter Nonlinearity—E.g., A Multibit CT <inline-formula> <tex-math notation="LaTeX">$\Delta\Sigma$</tex-math> </inline-formula> Modulator

Herkle

Becker

Ortmanns

2016

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

This paper presents a novel approach of deriving physical unclonable functions (PUF) from correction circuits measuring and digitizing nonlinearities of data converters. The often digitally available correction data can then be used to generate a fingerprint of the chip. The general concept is presented and then specifically evaluated on an existing Delta-Sigma (ΔΣ) modulator whose outermost feedback DAC mismatches are greatly influencing the overall performance and thus need correction. The applied mixed-signal correction scheme reveals the intrinsic mismatches which are firstly used to linearize the ΔΣ modulator, but which can also be further analyzed. The intra-Hamming distance is initially determined to values less than 6% at nominal conditions and could be further reduced to less than 2% by applying different encodings. Regarding the distinctness of devices, the inter-Hamming distance is highly stable under all circumstances with a value very close to 50%. Though the influence of varying environmental conditions on the stability of repeated PUF readouts is negligible, inevitable deviations in the correction coefficients increase the intra-Hamming distance with respect to nominal conditions. As a result, 80 highly stable identification bits are obtained from the exemplarily used ΔΣ modulator. Index Terms-DAC linearization, delta sigma modulation, physical unclonable function (PUF). 1549-8328

show abstract

Section: Exploiting Weak Pufs In Data Convertersmentioning

confidence: 99%