Excess loop delay compensation techniques in continuous-time ΔΣ modulators

The circuit non-idealities such as the opamp nonidealities, the clock jitter, comparator offset, DAC mismatch and the excess loop delay degrade the performance of the Continuous-time Sigma Delta Modulator. A study of a methods used for excess loop delay compensation is presented in this paper. The model used to analyze the techniques is a third order Single-bit Modulator with the Specification of LTE Network. The model have a sampling frequency at 459 MHz within 10 MHz.

[1]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[2]  Sajal Kumar Das.  Mobile Terminal Receiver Design: LTE and LTE-Advanced , 2016 .

[3]  A 13-mW 0.22-mm2 continuous-time Delta-Sigma ADC with 68-dB dynamic range in 10-MHz bandwidth , 2014, 2014 IEEE International Conference on Electron Devices and Solid-State Circuits.

[4]  Maurits Ortmanns,et al.  Finite GBW compensation technique for CT ΔΣ modulators with differentiator based ELD compensation , 2015, 2015 IEEE 13th International New Circuits and Systems Conference (NEWCAS).

[5]  Sai-Weng Sin,et al.  A passive Excess-Loop-Delay compensation technique for Gm-C based continuous-time ΣΔ modulators , 2011, 2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS).

[6]  Gabor C. Temes,et al.  Digital excess loop delay compensation technique with embedded truncator for continuous-time delta─sigma modulators , 2016 .

[7]  Gabor C. Temes,et al.  A continuous-time ΔΣ modulator with a digital technique for excess loop delay compensation , 2014, 2014 IEEE International Symposium on Circuits and Systems (ISCAS).

[8]  Vason P. Srini,et al.  Digital excess loop delay compensation for high speed delta–sigma modulators , 2015 .

[9]  Maurits Ortmanns,et al.  A Comparative Study on Excess-Loop-Delay Compensation Techniques for Continuous-Time Sigma–Delta Modulators , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[10]  Rocío del Río,et al.  CMOS Sigma-Delta Converters: Practical Design Guide , 2013 .

[11]  Lisa Dresner,et al.  Lte And The Evolution To 4g Wireless Design And Measurement Challenges , 2016 .