Design of differential difference amplifier (DDA) for biological signals processing

The work deals with the analog design of low-voltage and low-power differential difference amplifier DDA with adaptive differential input stage, second stage class AB, improved by a self – cascode to achieve higher gain and slew rate. Conventional and unconventional techniques, and methods for low-voltage and low-power design are presented. The finished design of the differential difference amplifier DDA with the analyzed results is presented. Design of a Butterwortho low-pass filter of the sixth order based on DDA with Sallen Key topology and design of a multifunctional ARC filter based on DDA