Models for Digital Program Amplifiers
Marieta Kovacheva and Ivailo Pandiev
Progress in Signals and Telecommunication Engineering, Vol. 11, No. 2, 2022.
DOI: 
Link: https://www.dline.info/pste/fulltext/v11n2/pstev11n2_2.pdf
Abstract:
We in this work have introduced models for digital program amplifiers. We have used the operational amplifiers to simplify the techniques. The proposition ensures the input impedance, transfer function (amplifier gain in binary steps versus controlling digital code through SPI), small-signal frequency response, large-signal pulse response, output characteristic (voltage and current limitations) and output resistance. Using microchip, we have extracted the measures with one and two channels PGA. With the help of the structure and operation principles we have developed the circuits. The pGA based model have used the format of the simulation program system of the Mentor Graphics. The testing outcome confirm with the theoretical propositions.