Quick Method for Parameter Research of Higher Order Sigma-Delta Modulators Using Dynamically Reprogrammable FPAA

R. Suszyński (Koszalin Univ. of Techn., Poland)

Development of mixed signal circuits is expensive and time-consuming. Lack of flexible CAD tools makes new methods of prototyping very attractive for designers. The ORG_SecOrd software controlling a prototype Sigma-Delta modulator, using the capabilities for dynamic reprogramming of FPAA AN221E04 device from the Anadigm®, is proposed in the paper. It is an innovative tool providing an effective method for the analysis and tests of experimental structures of modulators. It allows the experimental selection or adjustment of the structure of the modulator to achieve its specific properties. To confirm the validity of the design assumptions of the proposed system the measurement results of three different structures for Sigma-Delta second order modulator are shown.