SD Toolbox

SD Toolbox Reference

About SD Toolbox

The SD toolbox is a toolbox created to simulate at behavioral level (within Simulink environment) Switched Capacitor (SC) Sigma-Delta modulators. All of the most important non-idealities are included, such as sampling jitter, kT/C noise, internal ADC/DAC parameters (mismatch and non-linearity) and operational amplifier parameters (white noise, 1/f noise, finite dc gain, finite bandwidth, slew rate and saturation voltages). Moreover, the SD toolbox provides blocks and scripts for postprocessing the simulation results in order to obtain power spectral densities, signal-to-noise ratio (SNR) and effective number of bits (ENOB).

Building Block Description

Browse blocks and commands by following these links:

• Colored Noise
• White Noise
• kT/C Noise
• Jittered Sine Wave
• Sampling Jitter
• Switch Non-Linearity
• Real Integrator (with Delay)
• Real Integrator (no delay)
• Real Resonator
• Ideal Integrator (with Delay)
• Ideal Integrator (no Delay)
• Ideal Resonator
• Power Spectral Density
• ADC-DAC

Postprocessing Function

The SD toolbox includes the function calcSNR which performs all the postprocessing step required to obtain the power spectral density (PSD) and the signal-to-noise ratio (SNR) from the output of a Sigma-Delta modulator.

Examples

The SD toolbox includes a number of examples showing how to use the different blocks.