Analytical and experimental verification of substrate noise spectrum for mixed-signal ICs

Modelling of Substrate Noise and Mitigation Schemes for UWB Systems

“…A slightly different approach is to make use of analytical methods where, based on mathematical analysis of waveform functions characterizing the switching current and a transfer function model of the switching noise propagation, closed-form expressions for the switching noise can be derived (18,19). While this method provides more insight into the propagation of switching noise the switching current source still needs to be characterized through SPICE simulations.…”

“…How to find the parameters in the transfer function H(jω), has been provided in previous studies (6,18). The remaining challenge is to find a scalable analytical model for I s .…”

“…Since the input signal is periodic, the switching noise is periodic as well. Thus the switching noise could be represented as a summation of harmonics in frequency domain and it can be derived based on parameters extracted from the layout and bonding wires (6,18). T is the period of the input signal and k is an integer.…”

“…7.3.1, the switching noise generated by digital circuits can propagate through the substrate to reach sensitive analog/RF circuits and deteriorate their performance. A number of methods have been proposed for achieving an efficient model that is able to capture the main features of the switching noise (4)(5)(6)(7)(12)(13)(14)(15)(16)(17)(18). For heavily doped substrates the substrate is simplified as one electrical node due to their low resistivity, and switching noise modeling methods using this simplification have been proposed (13,14).…”

The verification of the substrate mathematics model and optimization of the substrate noise canceling technique in mixed signal ICs

“…In this experiment, we use the exit parameter obtained by other researchers [1]. The peak voltages of the substrate noise can be derived by simulation using spice tools (OrCad).…”