Flexible Analog Building Blocks

This chapter introduces challenges and possible approaches to tackle the design of analog circuits that should provide flexible performance. The concept of Analog Design for Flexibility (ADF) is introduced that provides all the requirements to obtain a programmable analog circuit minimizing time-to-design, costs, and power consumption. Several basic analog circuit topologies, including op-amps, transconductors, and biquadratic sections are discussed and compared in terms of performance and implementation feasibility.