| Zugriffsnummer | 15175 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Improved null cancellation in A 6th-order Σ-Δ modulator realized with two 3RD-order sections |
| Autor(in); Institution |
Davis, Alan J.; University of Rhode Island, Kingston, Rhode Island, USA
Fischer, Godi; University of Rhode Island, Kingston, Rhode Island, USA
Albrecht, Hans-Helge; 8.201, Medizinische Messdatenerfassungssysteme, PTB-Berlin
Hess, Jürgen; 8.201, Medizinische Messdatenerfassungssysteme, PTB-Berlin
|
| Quelle/Jahr | ADDA and EWADC 2002 : 4th International Conference on Advanced A/D and D/A Conversation Techniques and their Applications and 7th European Workshop on ADCV Modelling and Testing:(2002), 31 - 34 |
| Herausgeber(in) |
Holub, J.
|
| ISBN | 80-01-02540-3 |
| Verlag | Praha: CVUT |
| Konferenzangaben | 4th International Conference on Advanced A/D and D/A Conversion Techniques and their Applications and 7th European Workshop on ADC Modelling and Testing, Prague, 26-28, June, 2002, Czech Republic |
| Zusammenfassung | This paper presents an improved method to digitally correct for static, analog circuit imperfections in a two-stage, 6th order, cascaded (6-3) sigma-delta modulator. By adding a digital correction term to the output of the digital noise cancellation filter, the first stage parasitic quantization noise due to finite amplifier gain and C-Ratio mismatches can be completely removed. A 6-3 modulator implemented as a fully differential switched-capacitor circuit, designed for an OSR of 16, has been fabricated in a 1.2 μm double-poly n-well CMOS process. Improvements have been made in the null cancellation leading to approximately a 10 dB increase in SNDR over a range of signal amplitudes from 12 μVolts to 500 mV. A peak SNDR/SFDR of 87/100 dB for a 1 MHz sample rate and 84/93 dB for a 2.5 MHz sample rate have been achieved. |
Zitierung
Davis, A. J., Fischer, G., Albrecht, H.-H., & Hess, J. (2002). Improved null cancellation in A 6th-order Σ-Δ modulator realized with two 3RD-order sections. 4th International Conference on Advanced A/D and D/A Conversion Techniques and their Applications and 7th European Workshop on ADC Modelling and Testing, Prague, 26-28, June, 2002, Czech Republic.