The problem of choosing the modulator structural circuit in designing delta sigma ADC, intended for multistandard processing, has been considered. An approach to creation of the modulator architecture and to revealing the restrictions related to the application specifics has been proposed. The multicascade topology permits simply to switch on/off the multistandard module cascades while retaining the stability and low susceptibility to the technology imperfection. Such modulators are capable to operate concurrently in two modes (e.g. to sample GSM and Bluetooth signals) by employing the specific switch interface.
1. Лаврентьев М.В., Круглов Ю.В. Выбор архитектуры многокаскадного дельта-сигма модулятора на основе оценки «просачивающегося» шума квантования и физического шума // Изв. вузов. Электроника. – 2005. – № 3. – С. 40–45.
2. Abhilash K.N., Srinivas M.B. A reconfigurable 0-L1-L2 S-MASH2 modulator with high-level sizing and power estimation // System-on-Chip Conference (SOCC): 27-th IEEE Interna-tional. – 2014. – P. 347–352.
3. Barangi M., Beirami A., Nejati H., Ali W.H. A continuous-time sigma-delta ADC with tunable pass-band for multi-standard applications // Circuits and Systems (MWSCAS): IEEE 56th International Midwest Symposium. – 2013. –
P. 633–636.
4. Morgado A., del Rio R., dela Rosa J.M. High-Efficiency Cascade \Sigma \Delta Modula-tors for the Next Generation Software-Defined-Radio Mobile Systems // Instrumentation and Measurement: IEEE Transactions on. – 2012. – Vol. 61. – Iss. 11. – P. 2860–2869.
5. Multirate Cascaded Discrete-Time Low-Pass Modulator for GSM/Bluetooth/UMTS / L. Bos et al. // IEEE J. of Solid-State Circuits. – 2010. – Vol. 45. – P. 1198–1208.
6. Analog baseband Channel for Reconfigurable Multistandard (GSM/UMTS/WLAN/Bluetooth) Receivers / N. Ghittori, A. Vigna, P. Malcovati et al. // Proc. of the WIRTEP. – 2006. – P. 88–92.
7. Wideband low-distortion sigma-delta ADC for WLAN / B.R. Jose, Kochi, Mythili P. et al. // Information, Communications & Signal Processing: 6th International Conference. – 2007. – P. 1–5.
8. Jinseok Koh, Gabriel Gomez, Khurram Muhammad. A Sigma-Delta ADC with Decima-tion and Gain Control
Function for a Bluetooth Receiver in 130 nm Digital CMOS», EURASIP // J. on Wireless Com-munications and Networking. – 2006. – Article ID71249. – P. 1–8.
9. Farahani B.J., Ismail M. A low power multi-standard sigma-delta ADC for WCDMA/GSM/Bluetooth applications // Circuits and Systems, 2004. NEWCAS: The 2nd An-nual IEEE Northeast Workshop on. – 2004. – P. 241–243.