DIGITAL FILTERS FOR BAND-PASS SIGMA-DELTA CONVERTER FOR COMPLEX SENSOR SYSTEMS |
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| Marián Chovanec, Linus Michaeli, Martin Sekerák, Ján Šaliga |
- Abstract:
- Sigma delta modulation is useful for high performance analog-to-digital conversion of narrow band signals. Band-pass sigma delta modulation (BP ΣΔ ADC) is suitable for communication systems such as AM/FM receivers and mobile phones. Application of BP ΣΔ ADC in sensor systems is presented in the paper. BP ΣΔ ADC performs I/Q conversion of the complex impedance from two dimensional sensor into two digital values representing real and imaginary part of sensor output. The BP ΣΔ ADC is useful for outputs processing from the modulating sensors too. Implemented digital filters have important impact on the metrological properties of whole BP ΣΔ ADC. The various types of FIR and IIR filters are studied in the paper and their phase sensitivity and transmission of modulated signal are studied.
- Download:
- IMEKO-IWADC-2010-128.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- "Instrumentation for the Information and Communication Technology Era"
- Title:
- 15th International Workshop on ADC Modelling and Testing & XVIIth IMEKO TC4 Symposium (together with 3rd IMEKO TC19 Symposium) (IWADC)
- Place:
- Kosice, SLOVAKIA
- Time:
- 08 September 2010 - 10 September 2010