Parameters of Band Pass ΣΔ ADC and the Comparison with the Standard Ones

Martin Kollár, Linus Michaeli, Ján Šaliga

Abstract

The bandpass sigma delta analog-digital converters (BP ΣΔ-ADC) represent a subgroup from the more general group of the unconventional ADCs. The BP ΣΔ-ADCs are mostly embedded into digital communication systems (DCS) in various applications. Their main task is to provide a frequency down conversion along with the conversion of chosen parameter of analog signal into digit. These converters are analog front end for DCS like software radios, UMTS, GSM and GPS systems. Parameters for characterisation of BP ΣΔ-ADC are until now taken intuitively and they are different from the standard conventional ADCs. The paper reviews existing parameters for conventional ADC with the aim to midificate them for BP ΣΔ-ADC.

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IMEKO-TC4-2005-110.pdf

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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