Non-ideal Characteristics of an Operational Amplifier
Gurung, Dil (2025)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2025100925805
https://urn.fi/URN:NBN:fi:amk-2025100925805
Tiivistelmä
The aim of this thesis was to provide the reader with detailed theoretical background of the operational amplifier. It also presents the non-ideal characteristics of an op-amp, open and closed loop configuration, and inverting and non-inverting circuits. The objective of the thesis was to design PCB test boards of sample op-amps and demonstrate their functionality as well as to measure non-ideal characteristics, such as input offset voltage, input bias current, gain bandwidth product, and slew rate.
This study selected three samples of op-amps in such a way that they can be distinguished from their non-ideal parameter values. The schematic and PCB were designed in KiCad to measure non-ideal characteristics. The non-ideal parameter values of the samples were analysed in Multisim and measured through the PCB board at the electronics laboratory at Metropolia University of Applied Sciences. The measured values were compared to the datasheet values, and the achieved result was satisfactory.
The design PCB can be used in the laboratory project for an analog electronics course to distinguish sample op-amps. The limitation of this thesis was the inability to measure the slew rate of OPA134 because of its high value.
This study selected three samples of op-amps in such a way that they can be distinguished from their non-ideal parameter values. The schematic and PCB were designed in KiCad to measure non-ideal characteristics. The non-ideal parameter values of the samples were analysed in Multisim and measured through the PCB board at the electronics laboratory at Metropolia University of Applied Sciences. The measured values were compared to the datasheet values, and the achieved result was satisfactory.
The design PCB can be used in the laboratory project for an analog electronics course to distinguish sample op-amps. The limitation of this thesis was the inability to measure the slew rate of OPA134 because of its high value.