Study of Quantizer-Bandwidth in Continuous-Time Delta-Sigma Modulators
- 1 May 2019
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 21581525,p. 1-5
Abstract
The effect of finite bandwidth of quantizers in continuous-time (CT) delta-sigma modulators (DSMs) is studied. It is shown that the finite quantizer-bandwidth in CTDSMs degrades the performance much more severely than it does in their discrete-time counterparts. It is demonstrated that CTDSMs with excess loop delay (ELD) compensation schemes require an even higher quantizer-bandwidth compared to ELD-free CTDSMs. Furthermore, it is shown that the required quantizer-bandwidth increases as the order and the out-of-band gain increases. Detailed mathematical analyses and simulation results are provided to show the effect of the finite quantizer-bandwidth.Keywords
This publication has 6 references indexed in Scilit:
- Design Techniques for Wideband Single-Bit Continuous-Time $\Delta\Sigma$ Modulators With FIR Feedback DACsIEEE Journal of Solid-State Circuits, 2012
- Exploration of Second-Order Effects in High-Performance Continuous-Time $\Sigma\Delta$ Modulators Using Discrete-Time ModelsIEEE Transactions on Circuits and Systems I: Regular Papers, 2012
- Excess Loop Delay Compensation in Continuous-Time Delta-Sigma ModulatorsIEEE Transactions on Circuits and Systems II: Express Briefs, 2008
- A 2.7-mW 2-MHz Continuous-Time $\Sigma \Delta$ Modulator With a Hybrid Active–Passive Loop FilterIEEE Journal of Solid-State Circuits, 2008
- A Continuous-Time>tex<$Sigma Delta $>/tex<Modulator With 88-dB Dynamic Range and 1.1-MHz Signal BandwidthIEEE Journal of Solid-State Circuits, 2004
- Excess loop delay in continuous-time delta-sigma modulatorsIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1999