9. Review of Combinational and Sequential Logic Circuits and Design

In order to provide a reference material for all the past eight chapters, a brief review of combinational and sequential logic design principles is presented in this chapter. A complete design does not only contain a sensor, analog signal conditioning circuits and data converters. Combinational and sequential logic blocks, in the form of “glue logic”, support various parts of the analog data-path, and therefore they constitute the major part of the design. Some of the analog front-end projects presented at the end of chapter eight prove that both analog and digital components must be integrated in a design in order to achieve complete functionality. Therefore, a solid understanding in digital logic design becomes a requirement to be able to build the entire analog front-end electronics for a sensor array prior to interfacing with a microcontroller.