Operational Amplifier, Differential Amplifier, Summing Amplifier

The document provides a detailed overview of operational amplifiers (op-amps), including their history, types (differential and summing amplifiers), and essential parameters such as common-mode rejection ratio (CMRR) and bias current. It explains the configurations and functionalities of these amplifiers, highlighting their applications in various electronic circuits. Additionally, the document summarizes the advantages and disadvantages of these amplifiers, emphasizing their role in noise reduction and signal processing.