1. Passive components and their models

Analog monolithic integrated circuits include numerous passive components such as resistors, capacitors, inductances or lines in various configurations. These components will be more or less the same, whatever the choice of active components and substrate. Only inductances on Si substrates have been the subject of recent studies, which have taken substrate losses into account or eliminated them. This paragraph gives an idea of the structure, physical limits and models of these components. Although the modeling of a passive component such as an inductor seems to have been established many years ago, it will become clear that this is far from being the case, and this will be an opportunity to show under what conditions models can be established from physical formulations or from measurements.