Uni Ulm Sigma-Delta Synthesis Tool

The Uni Ulm Sigma-Delta Synthesis Tool is a web-based design tool for continuous-time ΣΔ modulators. It allows the direct design of the modulator including non-idealities within extremly short response times. There is no need of a subsequent transformation from discrete-time to continuous-time. This tool is freely available at not charge (see Terms of Use for more information)!

CT ΣΔ Modulator Synthesis Tool
Go to CT ΣΔ Modulator Synthesis Tool
Go to development version

If you use this synthesis tool, please remember to reference our publications!


  • Update 09.11.2017: Developement Version including new bandpass models and supsampling online
  • Update 21.11.2016: Initial support for CT bandpass ΣΔ modulators
  • Update 07.03.2016: Negative coefficients possible, bugfixes for STF calculation
  • Update 08.10.2015: Multiple DACs with individual waveforms, more ELD compensation techniques (capacitive coupling, semi-digital differentiator), bugfixes and interface improvements