Efficient modeling of analog and mixed A/D systems via piece-wise linear technique

In this paper an application of the piece-wise linear (PWL) modeling technique is presented. It is oriented towards functional-level modeling of analog and mixed-signal A/D systems. The principles of the actual PWL approach are briefly described. The models are based mainly on first order differential equations, which are solved by an explicit PWL algorithm. All the analog signals propagating through a network are PWL signals obtained with the built-in approximator. Examples of some models are discussed in detail, including a support by the waveform relaxation technique. Implementation of the PWL models in a discrete VHDL environment is emphasized. Some simulation examples of A/D networks, obtained by means of the V-System simulator are also included.