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High-resolution floating-point ADC

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1 Author(s)
Groza, V.Z. ; Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont., Canada

Floating-point analog-to-digital converters (FP-ADC) are used for acquiring signals within a high dynamic range. The quantization range of FP-ADCs is several orders of magnitude higher than that of a fixed-point analog-to-digital converter (ADC). Comparing floating-point quantization with uniform quantization, it is shown that the FP-ADC is superior from a statistical point of view over the ADC, but at the price of doubling the conversion time. An improved FP-ADC that achieves a higher acquisition rate, while preserving the highest possible resolution, is presented. Simulation results illustrate the performance of the new FP-ADC

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Instrumentation and Measurement, IEEE Transactions on  (Volume:50 ,  Issue: 6 )