In this video we introduce the differential amplifier. We examine the DC analysis of a basic circuit and define input bias current, input offset current and output offset voltage. Reference: Operational Amplifiers and Linear Integrated Circuits, Chapter 1. My free texts and lab manuals are available for download at my college web site https://www.mvcc.edu/jfiore and at my personal site http://www.dissidents.com/ Inexpensive print and kindle copies are available at Amazon https://www.amazon.com/author/jimfiore If you like my texts and videos, and would like to help defray the costs of making and maintaining them, consider making a modest donation at https://www.buymeacoffee.com/ProfessorFiore