Design considerations for analog blocks in mixed-signal CMOS ICs

This paper illustrates some design strategies for the design of mixed analog-digital integrated circuits in CMOS technology. In mixed-signal systems, crosstalk from switching logic gates can disturb the operation of analog circuitry. Therefore, it is necessary to take into account digital switching noise from early stages of design, by means of a suitable model. The analog designer should select the most suitable architectures with respect to crosstalk robustness. Finally, physical design must be optimized for the fabrication technology, to ensure a proper isolation between digital and analog sections.