Modeling and Evaluation of Bandpass Σ∆ Modulator Non-Idealities Using Simplorer VHDL-AMS
نویسندگان
چکیده
This paper describes an implementation of a bandpass sigma-delta modulator behavioral model with SIMPLORER VHDL-AMS. The model includes most of the non-idealities which affect the performance of the component, such as sampling jitter, kT/C noise and operational amplifier parameters. A comparison with another model, implemented with MATLABSIMULINK by Brigati et al., is made to highlight and validate the proposed model. The spectrum plot and the Power Spectral Density of the output signal is also presented to evaluate the characteristics of the modulator. Simulation results obtained using a second-order band-pass sigma-delta modulator demonstrate the validity of the model by the mean of estimating signal-to-noise and distortion ratios. Keywords— Sigma Delta Analog-Digital Converter; Band-pass Modulator; Simplorer VHDL-AMS; Power Spectral Density; Non-idealities Effects.
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