A Novel Recursive Analog to Digital Conversion Method |
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| Karsten Leitis, Tommy Halim |
- Abstract:
- This paper presents a novel scheme for conversion of analog to digital signals. Applying a native conversion resolution of just one bit with only one comparator the converter is able to increase the resolution as it can be the case with dual slope or ΔΣ converters. The new concept is based on a recursive operation. Therefore the converter is named rADC - recursive ADC. By processing ten recursive cycles a 10 Bit 1 MSa/s test result has been achieved by simulation of a 180 nm CMOS test circuit. The rADC components of the CMOS test circuit are a comparator, a S/H circuit, some gates, transmission gates and two resistors. By the means of a digital control sequence the upper and lower converter reference voltages are redefined in each cycle. As a result the number of cycles or iterations, respectively, determine the resolution of the recursive ADC.
- Download:
- IMEKO-TC4-2020-73.pdf
- DOI:
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